Edward Teller (Hungarian: Teller Ede; January 15, 1908 – September 9, 2003) was a Hungarian-American theoretical physicist who is known colloquially as "the father of the hydrogen bomb", although he did not care for the title. He made numerous contributions to nuclear and molecular physics, spectroscopy (in particular the Jahn–Teller and Renner–Teller effects), and surface physics. His extension of Enrico Fermi's theory of beta decay, in the form of Gamow–Teller transitions, provided an important stepping stone in its application, while the Jahn–Teller effect and the Brunauer–Emmett–Teller (BET) theory have retained their original formulation and are still mainstays in physics and chemistry. Teller also made contributions to Thomas–Fermi theory, the precursor of density functional theory, a standard modern tool in the quantum mechanical treatment of complex molecules. In 1953, along with Nicholas Metropolis, Arianna Rosenbluth, Marshall Rosenbluth, and Augusta Teller, Teller co-authored a paper that is a standard starting point for the applications of the Monte Carlo method to statistical mechanics. Throughout his life, Teller was known both for his scientific ability and for his difficult interpersonal relations and volatile personality.
Teller was born in Hungary and emigrated to the United States in the 1930s. He was an early member of the Manhattan Project, charged with developing the first atomic bomb; during this time he made a serious push to develop the first fusion-based weapons as well, but these were deferred until after World War II. After his controversial testimony in the security clearance hearing of his former Los Alamos Laboratory superior, J. Robert Oppenheimer, Teller was ostracized by much of the scientific community. He continued to find support from the U.S. government and military research establishment, particularly for his advocacy for nuclear energy development, a strong nuclear arsenal, and a vigorous nuclear testing program. He was a co-founder of Lawrence Livermore National Laboratory (LLNL), and was both its director and associate director for many years.
In his later years, Teller became especially known for his advocacy of controversial technological solutions to both military and civilian problems, including a plan to excavate an artificial harbor in Alaska using thermonuclear explosive in what was called Project Chariot. He was a vigorous advocate of Ronald Reagan's Strategic Defense Initiative.
Teller in 1958 as Director of the Lawrence Livermore National Laboratory.
|Born||January 15, 1908|
|Died||September 9, 2003 (aged 95)|
Stanford, California, U.S.
United States (March 6, 1941)
Augusta Maria Harkanyi
(m. 1934; her death 2000)
|Doctoral advisor||Werner Heisenberg|
|Other notable students||Jack Steinberger|
Ede Teller was born on January 15, 1908, in Budapest, Austria-Hungary, into a Jewish family. His parents were Ilona (born Deutsch; 1883–1977), a pianist, and Miksa (Max) Teller (1871–1950), an attorney. He learned in the Fasori Lutheran Gymnasium, then in the Minta (Model) Gymnasium in Budapest. Jewish of origin, later in life Teller became an agnostic Jew. "Religion was not an issue in my family", he later wrote, "indeed, it was never discussed. My only religious training came because the Minta required that all students take classes in their respective religions. My family celebrated one holiday, the Day of Atonement, when we all fasted. Yet my father said prayers for his parents on Saturdays and on all the Jewish holidays. The idea of God that I absorbed was that it would be wonderful if He existed: We needed Him desperately but had not seen Him in many thousands of years." Like Einstein and Feynman, Teller was a late talker. He developed the ability to speak later than most children, but became very interested in numbers, and would calculate large numbers in his head for fun.
Teller left Hungary in 1926, partly due to the discriminatory numerus clausus rule under Miklós Horthy's regime. The political climate and revolutions in Hungary during his youth instilled a lingering animosity for both Communism and Fascism in Teller. When he was a young student, his right foot was severed in a streetcar accident in Munich, requiring him to wear a prosthetic foot, and leaving him with a lifelong limp. Werner Heisenberg said that it was the hardiness of Teller's spirit, rather than stoicism, that allowed him to cope so well with the accident.
Teller graduated in chemical engineering at the University of Karlsruhe, and received in 1930 his Ph.D. in physics under Werner Heisenberg at the University of Leipzig. Teller's dissertation dealt with one of the first accurate quantum mechanical treatments of the hydrogen molecular ion. In 1930 he befriended Russian physicists George Gamow and Lev Landau. Teller's lifelong friendship with a Czech physicist, George Placzek, was also very important for his scientific and philosophical development. It was Placzek who arranged a summer stay in Rome with Enrico Fermi in 1932, thus orienting Teller's scientific career in nuclear physics.
In 1930, Teller moved to the University of Göttingen, then one of the world's great centers of physics due to the presence of Max Born and James Franck, but after Adolf Hitler became Chancellor of Germany in January 1933, Germany became unsafe for Jewish people, and he left through the aid of the International Rescue Committee. He went briefly to England, and moved for a year to Copenhagen, where he worked under Niels Bohr. In February 1934, he married his long-time girlfriend Augusta Maria "Mici" (pronounced "Mitzi") Harkanyi, the sister of a friend. He returned to England in September 1934.
Mici had been a student in Pittsburgh, and wanted to return to the United States. Her chance came in 1935, when, thanks to George Gamow, Teller was invited to the United States to become a Professor of Physics at George Washington University, where he worked with Gamow until 1941. At George Washington University in 1937, Teller predicted the Jahn–Teller effect, which distorts molecules in certain situations; this affects the chemical reactions of metals, and in particular the coloration of certain metallic dyes. Teller and Hermann Arthur Jahn analyzed it as a piece of purely mathematical physics. In collaboration with Stephen Brunauer and Paul Hugh Emmett, Teller also made an important contribution to surface physics and chemistry: the so-called Brunauer–Emmett–Teller (BET) isotherm. Teller and Mici became naturalized citizens of the United States on March 6, 1941.
When World War II began, Teller wanted to contribute to the war effort. On the advice of the well-known Caltech aerodynamicist and fellow Hungarian émigré Theodore von Kármán, Teller collaborated with his friend Hans Bethe in developing a theory of shock-wave propagation. In later years, their explanation of the behavior of the gas behind such a wave proved valuable to scientists who were studying missile re-entry.
In 1942, Teller was invited to be part of Robert Oppenheimer's summer planning seminar, at the University of California, Berkeley for the origins of the Manhattan Project, the Allied effort to develop the first nuclear weapons. A few weeks earlier, Teller had been meeting with his friend and colleague Enrico Fermi about the prospects of atomic warfare, and Fermi had nonchalantly suggested that perhaps a weapon based on nuclear fission could be used to set off an even larger nuclear fusion reaction. Even though he initially explained to Fermi why he thought the idea would not work, Teller was fascinated by the possibility and was quickly bored with the idea of "just" an atomic bomb even though this was not yet anywhere near completion. At the Berkeley session, Teller diverted discussion from the fission weapon to the possibility of a fusion weapon—what he called the "Super", an early concept of what was later to be known as a hydrogen bomb.
Arthur Compton, the chairman of the University of Chicago physics department, coordinated the uranium research of Columbia University, Princeton University, the University of Chicago, and the University of California, Berkeley. To remove disagreement and duplication, Compton transferred the scientists to the Metallurgical Laboratory at Chicago. Teller was left behind at first, because while he and Mici were now American citizens, they still had relatives in enemy countries. In early 1943, the Los Alamos laboratory was established in Los Alamos, New Mexico to design an atomic bomb, with Oppenheimer as its director. Teller moved there in March 1943. Apparently, Teller managed to annoy his neighbors there by playing the piano late in the night.
Teller became part of the Theoretical (T) Division. He was given a secret identity of Ed Tilden. He was irked at being passed over as its head; the job was instead given to Hans Bethe. Oppenheimer had him investigate unusual approaches to building fission weapons, such as autocatalysis, in which the efficiency of the bomb would increase as the nuclear chain reaction progressed, but proved to be impractical. He also investigated using uranium hydride instead of uranium metal, but its efficiency turned out to be "negligible or less". He continued to push his ideas for a fusion weapon even though it had been put on a low priority during the war (as the creation of a fission weapon proved to be difficult enough). On a visit to New York, he asked Maria Goeppert-Mayer to carry out calculations on the Super for him. She confirmed Teller's own results: the Super was not going to work.
A special group was established under Teller in March 1944 to investigate the mathematics of an implosion-type nuclear weapon. It too ran into difficulties. Because of his interest in the Super, Teller did not work as hard on the implosion calculations as Bethe wanted. These too were originally low-priority tasks, but the discovery of spontaneous fission in plutonium by Emilio Segrè's group gave the implosion bomb increased importance. In June 1944, at Bethe's request, Oppenheimer moved Teller out of T Division, and placed him in charge of a special group responsible for the Super, reporting directly to Oppenheimer. He was replaced by Rudolf Peierls from the British Mission, who in turn brought in Klaus Fuchs, who was later revealed to be a Soviet spy. Teller's Super group became part of Fermi's F Division when he joined the Los Alamos Laboratory in September 1944. It included Stanislaw Ulam, Jane Roberg, Geoffrey Chew, Harold and Mary Argo, and Maria Goeppert-Mayer.
Teller made valuable contributions to bomb research, especially in the elucidation of the implosion mechanism. He was the first to propose the solid pit design that was eventually successful. This design became known as a "Christy pit", after the physicist Robert F. Christy who made the pit a reality. Teller was one of the few scientists to actually watch (with eye protection) the Trinity nuclear test in July 1945, rather than follow orders to lie on the ground with backs turned. He later said that the atomic flash "was as if I had pulled open the curtain in a dark room and broad daylight streamed in."
In the days before and after the first demonstration of a nuclear weapon, the Trinity test in July 1945, his fellow Hungarian Leo Szilard circulated the Szilard petition, which argued that a demonstration to the Japanese of the new weapon should occur prior to actual use on Japan, and with that hopefully the weapons would never be used on people. In response to Szilard's petition, Teller consulted his friend Robert Oppenheimer. Teller believed that Oppenheimer was a natural leader and could help him with such a formidable political problem. Oppenheimer reassured Teller that the nation's fate should be left to the sensible politicians in Washington. Bolstered by Oppenheimer's influence, he decided to not sign the petition.
Teller therefore penned a letter in response to Szilard that read:
...I am not really convinced of your objections. I do not feel that there is any chance to outlaw any one weapon. If we have a slim chance of survival, it lies in the possibility to get rid of wars. The more decisive a weapon is the more surely it will be used in any real conflict and no agreements will help.
Our only hope is in getting the facts of our results before the people. This might help to convince everybody that the next war would be fatal. For this purpose actual combat-use might even be the best thing.
On reflection on this letter years later when he was writing his memoirs, Teller wrote:
First, Szilard was right. As scientists who worked on producing the bomb, we bore a special responsibility. Second, Oppenheimer was right. We did not know enough about the political situation to have a valid opinion. Third, what we should have done but failed to do was to work out the technical changes required for demonstrating the bomb [very high] over Tokyo and submit that information to President Truman.
Unknown to Teller at the time, four of his colleagues were solicited by the then secret May to June 1945 Interim Committee. It is this organization which ultimately decided on how the new weapons should initially be used. The committee's four-member Scientific Panel was led by Oppenheimer, and concluded immediate military use on Japan was the best option:
The opinions of our scientific colleagues on the initial use of these weapons are not unanimous: they range from the proposal of a purely technical demonstration to that of the military application best designed to induce surrender...Others emphasize the opportunity of saving American lives by immediate military use...We find ourselves closer to these latter views; we can propose no technical demonstration likely to bring an end to the war; we see no acceptable alternative to direct military use.
Teller later learned of Oppenheimer's solicitation and his role in the Interim Committee's decision to drop the bombs, having secretly endorsed an immediate military use of the new weapons. This was contrary to the impression that Teller had received when he had personally asked Oppenheimer about the Szilard petition: that the nation's fate should be left to the sensible politicians in Washington. Following Teller's discovery of this, his relationship with his advisor began to deteriorate.
In 1990, the historian Barton Bernstein argued that it is an "unconvincing claim" by Teller that he was a "covert dissenter" to the use of the weapon. In his 2001 Memoirs, Teller claims that he did lobby Oppenheimer, but that Oppenheimer had convinced him that he should take no action and that the scientists should leave military questions in the hands of the military; Teller claims he was not aware that Oppenheimer and other scientists were being consulted as to the actual use of the weapon and implies that Oppenheimer was being hypocritical.
Despite an offer from Norris Bradbury, who had replaced Oppenheimer as the director of Los Alamos in November 1945, to become the head of the Theoretical (T) Division, Teller left Los Alamos on February 1, 1946, to return to the University of Chicago as a professor and close associate of Fermi and Goeppert-Mayer. Mayer's work on the internal structure of the elements would earn her the Nobel Prize in Physics in 1963.
On April 18–20, 1946, Teller participated in a conference at Los Alamos to review the wartime work on the Super. The properties of thermonuclear fuels such as deuterium and the possible design of a hydrogen bomb were discussed. It was concluded that Teller's assessment of a hydrogen bomb had been too favourable, and that both the quantity of deuterium needed, as well as the radiation losses during deuterium burning, would shed doubt on its workability. Addition of expensive tritium to the thermonuclear mixture would likely lower its ignition temperature, but even so, nobody knew at that time how much tritium would be needed, and whether even tritium addition would encourage heat propagation.
At the end of the conference, in spite of opposition by some members such as Robert Serber, Teller submitted an optimistic report in which he said that a hydrogen bomb was feasible, and that further work should be encouraged on its development. Fuchs also participated in this conference, and transmitted this information to Moscow. With John von Neumann, he contributed an idea of using implosion to ignite the Super. The model of Teller's "classical Super" was so uncertain that Oppenheimer would later say that he wished the Russians were building their own hydrogen bomb based on that design, so that it would almost certainly retard their progress on it.
Classified paper by Teller and Ulam on March 9, 1951: On Heterocatalytic Detonations I: Hydrodynamic Lenses and Radiation Mirrors, in which they proposed their revolutionary new design, staged implosion, the secret of the hydrogen bomb.
By 1949, Soviet-backed governments had already begun seizing control throughout Eastern Europe, forming such puppet states as the Hungarian People's Republic in Teller's homeland of Hungary, where much of his family still lived, on August 20, 1949. Following the Soviet Union's first test detonation of an atomic bomb on August 29, 1949, President Harry Truman announced a crash development program for a hydrogen bomb.
Teller returned to Los Alamos in 1950 to work on the project. He insisted on involving more theorists. but many of Teller's prominent colleagues, like Fermi and Oppenheimer, were sure that the project of the H-bomb was technically infeasible and politically undesirable. None of the available designs were yet workable. However Soviet scientists who had worked on their own hydrogen bomb have claimed that they developed it independently.
In 1950, calculations by the Polish mathematician Stanislaw Ulam and his collaborator Cornelius Everett, along with confirmations by Fermi, had shown that not only was Teller's earlier estimate of the quantity of tritium needed for the H-bomb a low one, but that even with higher amounts of tritium, the energy loss in the fusion process would be too great to enable the fusion reaction to propagate. However, in 1951 Teller and Ulam made a breakthrough, and invented a new design, proposed in a classified March 1951 paper, On Heterocatalytic Detonations I: Hydrodynamic Lenses and Radiation Mirrors, for a practical megaton-range H-bomb. The exact contribution provided respectively from Ulam and Teller to what became known as the Teller–Ulam design is not definitively known in the public domain, and the exact contributions of each and how the final idea was arrived upon has been a point of dispute in both public and classified discussions since the early 1950s.
In an interview with Scientific American from 1999, Teller told the reporter:
I contributed; Ulam did not. I'm sorry I had to answer it in this abrupt way. Ulam was rightly dissatisfied with an old approach. He came to me with a part of an idea which I already had worked out and had difficulty getting people to listen to. He was willing to sign a paper. When it then came to defending that paper and really putting work into it, he refused. He said, "I don't believe in it."
The issue is controversial. Bethe considered Teller's contribution to the invention of the H-bomb a true innovation as early as 1952, and referred to his work as a "stroke of genius" in 1954. In both cases, however, Bethe emphasized Teller's role as a way of stressing that the development of the H-bomb could not have been hastened by additional support or funding, and Teller greatly disagreed with Bethe's assessment. Other scientists (antagonistic to Teller, such as J. Carson Mark) have claimed that Teller would have never gotten any closer without the assistance of Ulam and others. Ulam himself claimed that Teller only produced a "more generalized" version of Ulam's original design.
The breakthrough—the details of which are still classified—was apparently the separation of the fission and fusion components of the weapons, and to use the X-rays produced by the fission bomb to first compress the fusion fuel (by process known as "radiation implosion") before igniting it. Ulam's idea seems to have been to use mechanical shock from the primary to encourage fusion in the secondary, while Teller quickly realized that X-rays from the primary would do the job much more symmetrically. Some members of the laboratory (J. Carson Mark in particular) later expressed the opinion that the idea to use the x-rays would have eventually occurred to anyone working on the physical processes involved, and that the obvious reason why Teller thought of it right away was because he was already working on the "Greenhouse" tests for the spring of 1951, in which the effect of x-rays from a fission bomb on a mixture of deuterium and tritium was going to be investigated.
Whatever the actual components of the so-called Teller–Ulam design and the respective contributions of those who worked on it, after it was proposed it was immediately seen by the scientists working on the project as the answer which had been so long sought. Those who previously had doubted whether a fission-fusion bomb would be feasible at all were converted into believing that it was only a matter of time before both the USA and the USSR had developed multi-megaton weapons. Even Oppenheimer, who was originally opposed to the project, called the idea "technically sweet."
Though he had helped to come up with the design and had been a long-time proponent of the concept, Teller was not chosen to head the development project (his reputation of a thorny personality likely played a role in this). In 1952 he left Los Alamos and joined the newly established Livermore branch of the University of California Radiation Laboratory, which had been created largely through his urging. After the detonation of Ivy Mike, the first thermonuclear weapon to utilize the Teller–Ulam configuration, on November 1, 1952, Teller became known in the press as the "father of the hydrogen bomb." Teller himself refrained from attending the test—he claimed not to feel welcome at the Pacific Proving Grounds—and instead saw its results on a seismograph in the basement of a hall in Berkeley.
There was an opinion that by analyzing the fallout from this test, the Soviets (led in their H-bomb work by Andrei Sakharov) could have deciphered the new American design. However, this was later denied by the Soviet bomb researchers. Because of official secrecy, little information about the bomb's development was released by the government, and press reports often attributed the entire weapon's design and development to Teller and his new Livermore Laboratory (when it was actually developed by Los Alamos).
Many of Teller's colleagues were irritated that he seemed to enjoy taking full credit for something he had only a part in, and in response, with encouragement from Enrico Fermi, Teller authored an article titled "The Work of Many People," which appeared in Science magazine in February 1955, emphasizing that he was not alone in the weapon's development. He would later write in his memoirs that he had told a "white lie" in the 1955 article in order to "soothe ruffled feelings", and claimed full credit for the invention.
Teller was known for getting engrossed in projects which were theoretically interesting but practically unfeasible (the classic "Super" was one such project.) About his work on the hydrogen bomb, Bethe said:
Nobody will blame Teller because the calculations of 1946 were wrong, especially because adequate computing machines were not available at Los Alamos. But he was blamed at Los Alamos for leading the laboratory, and indeed the whole country, into an adventurous programme on the basis of calculations, which he himself must have known to have been very incomplete.
During the Manhattan Project, Teller advocated the development of a bomb using uranium hydride, which many of his fellow theorists said would be unlikely to work. At Livermore, Teller continued work on the hydride bomb, and the result was a dud. Ulam once wrote to a colleague about an idea he had shared with Teller: "Edward is full of enthusiasm about these possibilities; this is perhaps an indication they will not work." Fermi once said that Teller was the only monomaniac he knew who had several manias.
Carey Sublette of Nuclear Weapon Archive argues that Ulam came up with the radiation implosion compression design of thermonuclear weapons, but that on the other hand Teller has gotten little credit for being the first to propose fusion boosting in 1945, which is essential for miniaturization and reliability and is used in all of today's nuclear weapons.
Teller became controversial in 1954 when he testified against Oppenheimer at Oppenheimer's security clearance hearing. Teller had clashed with Oppenheimer many times at Los Alamos over issues relating both to fission and fusion research, and during Oppenheimer's trial he was the only member of the scientific community to state that Oppenheimer should not be granted security clearance.
I do not want to suggest anything of the kind. I know Oppenheimer as an intellectually most alert and a very complicated person, and I think it would be presumptuous and wrong on my part if I would try in any way to analyze his motives. But I have always assumed, and I now assume that he is loyal to the United States. I believe this, and I shall believe it until I see very conclusive proof to the opposite.
He was immediately asked whether he believed that Oppenheimer was a "security risk", to which he testified:
In a great number of cases I have seen Dr. Oppenheimer act—I understood that Dr. Oppenheimer acted—in a way which for me was exceedingly hard to understand. I thoroughly disagreed with him in numerous issues and his actions frankly appeared to me confused and complicated. To this extent I feel that I would like to see the vital interests of this country in hands which I understand better, and therefore trust more. In this very limited sense I would like to express a feeling that I would feel personally more secure if public matters would rest in other hands.
Teller also testified that Oppenheimer's opinion about the thermonuclear program seemed to be based more on the scientific feasibility of the weapon than anything else. He additionally testified that Oppenheimer's direction of Los Alamos was "a very outstanding achievement" both as a scientist and an administrator, lauding his "very quick mind" and that he made "just a most wonderful and excellent director."
After this, however, he detailed ways in which he felt that Oppenheimer had hindered his efforts towards an active thermonuclear development program, and at length criticized Oppenheimer's decisions not to invest more work onto the question at different points in his career, saying: "If it is a question of wisdom and judgment, as demonstrated by actions since 1945, then I would say one would be wiser not to grant clearance."
By recasting a difference of judgment over the merits of the early work on the hydrogen bomb project into a matter of a security risk, Teller effectively damned Oppenheimer in a field where security was necessarily of paramount concern. Teller's testimony thereby rendered Oppenheimer vulnerable to charges by a Congressional aide that he was a Soviet spy, which resulted in the destruction of Oppenheimer's career.
Oppenheimer's security clearance was revoked after the hearings. Most of Teller's former colleagues disapproved of his testimony and he was ostracized by much of the scientific community. After the fact, Teller consistently denied that he was intending to damn Oppenheimer, and even claimed that he was attempting to exonerate him. However, documentary evidence has suggested that this was likely not the case. Six days before the testimony, Teller met with an AEC liaison officer and suggested "deepening the charges" in his testimony.
Teller always insisted that his testimony had not significantly harmed Oppenheimer. In 2002, Teller contended that Oppenheimer was "not destroyed" by the security hearing but "no longer asked to assist in policy matters." He claimed his words were an overreaction, because he had only just learned of Oppenheimer's failure to immediately report an approach by Haakon Chevalier, who had approached Oppenheimer to help the Russians. Teller said that, in hindsight, he would have responded differently.
Historian Richard Rhodes said that in his opinion it was already a foregone conclusion that Oppenheimer would have his security clearance revoked by then AEC chairman Lewis Strauss, regardless of Teller's testimony. However, as Teller's testimony was the most damning, he was singled out and blamed for the hearing's ruling, losing friends due to it, such as Robert Christy, who refused to shake his hand in one infamous incident. This was emblematic of his later treatment which resulted in his being forced into the role of an outcast of the physics community, thus leaving him little choice but to align himself with industrialists.
After the Oppenheimer controversy, Teller became ostracized by much of the scientific community, but was still quite welcome in the government and military science circles. Along with his traditional advocacy for nuclear energy development, a strong nuclear arsenal, and a vigorous nuclear testing program, he had helped to develop nuclear reactor safety standards as the chair of the Reactor Safeguard Committee of the AEC in the late 1940s, and in the late 1950s headed an effort at General Atomics which designed research reactors in which a nuclear meltdown would be impossible. The TRIGA (Training, Research, Isotopes, General Atomic) has been built and used in hundreds of hospitals and universities worldwide for medical isotope production and research.
Teller promoted increased defense spending to counter the perceived Soviet missile threat. He was a signatory to the 1958 report by the military sub-panel of the Rockefeller Brothers funded Special Studies Project, which called for a $3 billion annual increase in America's military budget.
In 1956 he attended the Project Nobska anti-submarine warfare conference, where discussion ranged from oceanography to nuclear weapons. In the course of discussing a small nuclear warhead for the Mark 45 torpedo, he started a discussion on the possibility of developing a physically small one-megaton nuclear warhead for the Polaris missile. His counterpart in the discussion, J. Carson Mark from the Los Alamos National Laboratory, at first insisted it could not be done. However, Dr. Mark eventually stated that a half-megaton warhead of small enough size could be developed. This yield, roughly thirty times that of the Hiroshima bomb, was enough for Chief of Naval Operations Admiral Arleigh Burke, who was present in person, and Navy strategic missile development shifted from Jupiter to Polaris by the end of the year.
He was Director of the Lawrence Livermore National Laboratory, which he helped to found with Ernest O. Lawrence, from 1958 to 1960, and after that he continued as an Associate Director. He chaired the committee that founded the Space Sciences Laboratory at Berkeley. He also served concurrently as a Professor of Physics at the University of California, Berkeley. He was a tireless advocate of a strong nuclear program and argued for continued testing and development—in fact, he stepped down from the directorship of Livermore so that he could better lobby against the proposed test ban. He testified against the test ban both before Congress as well as on television.
Teller established the Department of Applied Science at the University of California, Davis and LLNL in 1963, which holds the Edward Teller endowed professorship in his honor. In 1975 he retired from both the lab and Berkeley, and was named Director Emeritus of the Livermore Laboratory and appointed Senior Research Fellow at the Hoover Institution. After the fall of communism in Hungary in 1989, he made several visits to his country of origin, and paid careful attention to the political changes there.
Teller was one of the first prominent people to raise the danger of climate change, driven by the burning of fossil fuels. At an address to the membership of the American Chemical Society in December 1957, Teller warned that the large amount of carbon-based fuel that had been burnt since the mid-19th century was increasing the concentration of carbon dioxide in the atmosphere, which would "act in the same way as a greenhouse and will raise the temperature at the surface", and that he had calculated that if the concentration of carbon dioxide in the atmosphere increased by 10% "an appreciable part of the polar ice might melt."
I am to talk to you about energy in the future. I will start by telling you why I believe that the energy resources of the past must be supplemented. [...] And this, strangely, is the question of contaminating the atmosphere. [...] Whenever you burn conventional fuel, you create carbon dioxide. [...] Carbon dioxide has a strange property. It transmits visible light but it absorbs the infrared radiation which is emitted from the earth. Its presence in the atmosphere causes a greenhouse effect [....] It has been calculated that a temperature rise corresponding to a 10 per cent increase in carbon dioxide will be sufficient to melt the icecap and submerge New York. All the coastal cities would be covered, and since a considerable percentage of the human race lives in coastal regions, I think that this chemical contamination is more serious than most people tend to believe.
Teller was one of the strongest and best-known advocates for investigating non-military uses of nuclear explosives, which the United States explored under Operation Plowshare. One of the most controversial projects he proposed was a plan to use a multi-megaton hydrogen bomb to dig a deep-water harbor more than a mile long and half a mile wide to use for shipment of resources from coal and oil fields through Point Hope, Alaska. The Atomic Energy Commission accepted Teller's proposal in 1958 and it was designated Project Chariot. While the AEC was scouting out the Alaskan site, and having withdrawn the land from the public domain, Teller publicly advocated the economic benefits of the plan, but was unable to convince local government leaders that the plan was financially viable.
Other scientists criticized the project as being potentially unsafe for the local wildlife and the Inupiat people living near the designated area, who were not officially told of the plan until March 1960. Additionally, it turned out that the harbor would be ice-bound for nine months out of the year. In the end, due to the financial infeasibility of the project and the concerns over radiation-related health issues, the project was abandoned in 1962.
A related experiment which also had Teller's endorsement was a plan to extract oil from the tar sands in northern Alberta with nuclear explosions, titled Project Oilsands. The plan actually received the endorsement of the Alberta government, but was rejected by the Government of Canada under Prime Minister John Diefenbaker, who was opposed to having any nuclear weapons in Canada. After Diefenbaker was out of office, Canada went on to have nuclear weapons, from a US nuclear sharing agreement, from 1963 to 1984.
For some twenty years, Teller advised Israel on nuclear matters in general, and on the building of a hydrogen bomb in particular. In 1952, Teller and Oppenheimer had a long meeting with David Ben-Gurion in Tel Aviv, telling him that the best way to accumulate plutonium was to burn natural uranium in a nuclear reactor. Starting in 1964, a connection between Teller and Israel was made by the physicist Yuval Ne'eman, who had similar political views. Between 1964 and 1967, Teller visited Israel six times, lecturing at Tel Aviv University, and advising the chiefs of Israel's scientific-security circle as well as prime ministers and cabinet members.
In 1967 when the Israeli nuclear program was nearing completion, Teller informed Neeman that he was going to tell the CIA that Israel had built nuclear weapons, and explain that it was justified by the background of the Six-Day War. After Neeman cleared it with Prime Minister Levi Eshkol, Teller briefed the head of the CIA's Office of Science and Technology, Carl Duckett. It took a year for Teller to convince the CIA that Israel had obtained nuclear capability; the information then went through CIA Director Richard Helms to the president at that time, Lyndon B. Johnson. Teller also persuaded them to end the American attempts to inspect the Negev Nuclear Research Center in Dimona. In 1976 Duckett testified in Congress before the Nuclear Regulatory Commission, that after receiving information from "American scientist", he drafted a National Intelligence Estimate (NIE) on Israel's nuclear capability.
In the 1980s, Teller again visited Israel to advise the Israeli government on building a nuclear reactor. Three decades later, Teller confirmed that it was during his visits that he concluded that Israel was in possession of nuclear weapons. After conveying the matter to the U.S. government, Teller reportedly said: "They [Israel] have it, and they were clever enough to trust their research and not to test, they know that to test would get them into trouble."
Teller suffered a heart attack in 1979, and blamed it on Jane Fonda, who had starred in The China Syndrome, which depicted a fictional reactor accident and was released less than two weeks before the Three Mile Island accident. She spoke out against nuclear power while promoting the film. After the accident, Teller acted quickly to lobby in favor of nuclear energy, testifying to its safety and reliability, and soon after one flurry of activity suffered the attack. He signed a two-page-spread ad in the July 31, 1979, Wall Street Journal with the headline "I was the only victim of Three-Mile Island". It opened with:
On May 7, a few weeks after the accident at Three-Mile Island, I was in Washington. I was there to refute some of that propaganda that Ralph Nader, Jane Fonda and their kind are spewing to the news media in their attempt to frighten people away from nuclear power. I am 71 years old, and I was working 20 hours a day. The strain was too much. The next day, I suffered a heart attack. You might say that I was the only one whose health was affected by that reactor near Harrisburg. No, that would be wrong. It was not the reactor. It was Jane Fonda. Reactors are not dangerous.
In the 1980s, Teller began a strong campaign for what was later called the Strategic Defense Initiative (SDI), derided by critics as "Star Wars," the concept of using ground and satellite-based lasers, particle beams and missiles to destroy incoming Soviet ICBMs. Teller lobbied with government agencies—and got the approval of President Ronald Reagan—for a plan to develop a system using elaborate satellites which used atomic weapons to fire X-ray lasers at incoming missiles—as part of a broader scientific research program into defenses against nuclear weapons.
Scandal erupted when Teller (and his associate Lowell Wood) were accused of deliberately overselling the program and perhaps had encouraged the dismissal of a laboratory director (Roy Woodruff) who had attempted to correct the error. His claims led to a joke which circulated in the scientific community, that a new unit of unfounded optimism was designated as the teller; one teller was so large that most events had to be measured in nanotellers or picotellers.
Many prominent scientists argued that the system was futile. Hans Bethe, along with IBM physicist Richard Garwin and Cornell University colleague Kurt Gottfried, wrote an article in Scientific American which analyzed the system and concluded that any putative enemy could disable such a system by the use of suitable decoys that would cost a very small fraction of the SDI program.
In 1987 Teller published a book supporting civil defense and active protection systems such as SDI which was titled Better a Shield than a Sword and his views on the role of lasers in SDI were published, and are available, in two 1986-7 laser conference proceedings.
Following the 1994 Shoemaker-Levy 9 comet impacts with Jupiter, Teller proposed to a collective of U.S. and Russian ex-Cold War weapons designers in a 1995 planetary defense workshop at Lawrence Livermore National Laboratory (LLNL), that they collaborate to design a 1 gigaton nuclear explosive device, which would be equivalent to the kinetic energy of a 1 km diameter asteroid. In order to safeguard the earth, the theoretical 1 Gt device would weigh about 25–30 tons, hence light enough to be lifted on the Russian Energia rocket and it could be used to instantaneously vaporize a 1 km asteroid, divert the paths of extinction event class asteroids (greater than 10 km in diameter) within a few months of short notice, while with 1-year notice, at an interception location no closer than Jupiter, it would also be capable of dealing with the even rarer short period comets which can come out of the Kuiper belt and transit past Earth orbit within 2 years. For comets of this class, with a maximum estimated 100 km diameter, Charon served as the hypothetical threat.
Teller died in Stanford, California on September 9, 2003, at the age of 95. He had suffered a stroke two days before and had long been suffering from a number of conditions related to his advanced age.
A wish for his 100th birthday, made around the time of his 90th, was for Lawrence Livermore's scientists to give him "excellent predictions-calculations and experiments-about the interiors of the planets".
In his early career, Teller made contributions to nuclear and molecular physics, spectroscopy (the Jahn–Teller and Renner–Teller effects), and surface physics. His extension of Fermi's theory of beta decay (in the form of the so-called Gamow–Teller transitions) provided an important stepping stone in the applications of this theory. The Jahn–Teller effect and the BET theory have retained their original formulation and are still mainstays in physics and chemistry. Teller also made contributions to Thomas–Fermi theory, the precursor of density functional theory, a standard modern tool in the quantum mechanical treatment of complex molecules.
Teller's vigorous advocacy for strength through nuclear weapons, especially when so many of his wartime colleagues later expressed regret about the arms race, made him an easy target for the "mad scientist" stereotype. In 1991 he was awarded one of the first Ig Nobel Prizes for Peace in recognition of his "lifelong efforts to change the meaning of peace as we know it". He was also rumored to be one of the inspirations for the character of Dr. Strangelove in Stanley Kubrick's 1964 satirical film of the same name (others speculated to be RAND theorist Herman Kahn, mathematician John von Neumann, rocket scientist Wernher von Braun, and Secretary of Defense Robert McNamara). In the aforementioned Scientific American interview from 1999, he was reported as having bristled at the question: "My name is not Strangelove. I don't know about Strangelove. I'm not interested in Strangelove. What else can I say?... Look. Say it three times more, and I throw you out of this office." In one episode of Mission Hill (1999), a character appears to be inspired by Edward Teller. The character is very old, has pictures of himself and other scientists in his home office and is known as the father of the nuclear bomb.
Nobel Prize winning physicist Isidor I. Rabi once suggested that "It would have been a better world without Teller." In addition, Teller's false claims that Stanislaw Ulam made no significant contribution to the development of the hydrogen bomb (despite Ulam's key insights of using compression and staging elements to generate the thermonuclear reaction) and his personal attacks on Oppenheimer caused great animosity towards Teller within the general physics community.
In 1986, he was awarded the United States Military Academy's Sylvanus Thayer Award. He was elected a member of the U.S. National Academy of Sciences in 1948. He was a fellow of the American Academy of Arts and Sciences, the American Association for the Advancement of Science, and the American Nuclear Society. Among the honors he received were the Albert Einstein Award in 1958, the Enrico Fermi Award in 1962, the Eringen Medal in 1980, the Harvey Prize in 1975, the National Medal of Science in 1983, the Presidential Citizens Medal in 1989, and the Corvin Chain in 2001. He was also named as part of the group of "U.S. Scientists" who were Time magazine's People of the Year in 1960, and an asteroid, 5006 Teller, is named after him. He was awarded with the Presidential Medal of Freedom by President George W. Bush in 2003, less than two months before his death.
His final paper, published posthumously, advocated the construction of a prototype liquid fluoride thorium reactor. The genesis and impetus for this last paper, was recounted by the co-author Ralph Moir in 2007.
The year 2003 was an exciting one for new scientific discoveries and technological breakthroughs progress in many scientific fields. Some of the highlights of 2003, which will be further discussed below, include: the anthropologic discovery of 350,000-year-old footprints attesting to the presence of upright-walking humans; SpaceShipOne flight 11P making its first supersonic flight; the observation of a previously unknown element, moscovium was made; and the world's first digital camera with an organic light-emitting diode (OLED) display is released by Kodak.
The year 2003 is also notable for the disintegration of the Columbia Space Shuttle upon its re-entry into earth's atmosphere, a tragic disaster which took the lives of all seven astronauts on board; the Concorde jet made its last flight, bringing to an end the era of civilian supersonic travel, at least for the time being; and the death of Edward Teller, physicist and inventor of the hydrogen bomb.Boosted fission weapon
A boosted fission weapon usually refers to a type of nuclear bomb that uses a small amount of fusion fuel to increase the rate, and thus yield, of a fission reaction. The neutrons released by the fusion reactions add to the neutrons released due to fission, allowing for more neutron-induced fission reactions to take place. The rate of fission is thereby greatly increased such that much more of the fissile material is able to undergo fission before the core explosively disassembles. The fusion process itself adds only a small amount of energy to the process, perhaps 1%.The alternative meaning is an obsolete type of single-stage nuclear bomb that uses thermonuclear fusion on a large scale to create fast neutrons that can cause fission in depleted uranium, but which is not a two-stage hydrogen bomb. This type of bomb was referred to by Edward Teller as "Alarm Clock", and by Andrei Sakharov as "Sloika" or "Layer Cake" (Teller and Sakharov developed the idea independently, as far as is known).Einstein–Szilárd letter
The Einstein–Szilárd letter was a letter written by Leó Szilárd and signed by Albert Einstein that was sent to the United States President Franklin D. Roosevelt on August 2, 1939. Written by Szilárd in consultation with fellow Hungarian physicists Edward Teller and Eugene Wigner, the letter warned that Germany might develop atomic bombs and suggested that the United States should start its own nuclear program. It prompted action by Roosevelt, which eventually resulted in the Manhattan Project developing the first atomic bombs.Emil Konopinski
Emil John (Jan) Konopinski (December 25, 1911 in Michigan City, Indiana – May 26, 1990 in Bloomington, Indiana) was an American nuclear scientist of Polish origin. His parents were Joseph and Sophia Sniegowska.
He was, with George Uhlenbeck as thesis advisor, a 1934 Ph.D graduate of the University of Michigan, and later a professor of physics at Indiana University. His doctoral students include Eugene Greuling. During WW II Konopinski collaborated with Enrico Fermi on the first nuclear reactor at the University of Chicago. He also joined the Manhattan Project to develop the first nuclear weapon (atomic bomb).He, together with C. Marvin and Edward Teller, showed that a thermonuclear explosion would not ignite the atmosphere and thereby destroy the earth.An Atomic Energy Commission consultant from 1946 to 1968, he wrote a book entitled The Theory of Beta Radioactivity.Enrico Fermi Institute
The Institute for Nuclear Studies was founded September 1945 as part of the University of Chicago with Samuel King Allison as director. On November 20, 1955 it was renamed The Enrico Fermi Institute for Nuclear Studies. The name was shortened to The Enrico Fermi Institute (EFI) in January 1968.
Physicist Enrico Fermi was heavily involved in the founding years of the institute, and it was at his request that Allison took the position as the first director. In addition to Fermi and Allison, the initial faculty included Harold C. Urey, Edward Teller, Joseph E. Mayer, and Maria Goeppert Mayer.George H. Miley
George H. Miley (born 1933) is a professor emeritus of physics from the University of Illinois at Urbana–Champaign. Miley is a Guggenheim Fellow and Fellow of the American Nuclear Society, the American Physical Society and the Institute of Electrical and Electronic Engineers. He was Senior NATO Fellow from 1994 to 1995, received the Edward Teller Medal in 1995, the IEEE Nuclear and Plasma Science Award in Fusion Technology in 2003 and the Radiation Science and Technology Award in 2004. He holds several patents.George Placzek
George Placzek (native name: Georg Placzek) (September 26, 1905 – October 9, 1955) was a Czech physicist.Placzek was born in Brno, Moravia, then part of Austria-Hungary, into a wealthy Jewish family. He studied physics in Prague and Vienna. In the 1930s, Placzek was known as an adventurous person with sharp sense of humor, a tireless generator of novel physics ideas which he generously shared with his colleagues. The scope of Placzek's pilgrimage around world's physics centers in the 1930s was unique among his colleagues. He worked with Hans Bethe, Edward Teller, Rudolf Peierls, Werner Heisenberg, Victor Weisskopf, Enrico Fermi, Niels Bohr, Lev Landau, Edoardo Amaldi, Emilio Segrè, Otto Frisch, Leon van Hove and many other prominent physicists of his time. His wife, Els Placzek (née Andriesse) was an ex-wife of physicist Hans von Halban. He lost all his relatives to Holocaust, casting a tragic shadow on his life. Placzek's major areas of scientific work involved a fundamental theory of Raman scattering, molecular spectroscopy in gases and liquids, neutron physics and mathematical physics. Together with Otto Frisch, he suggested a direct experimental proof of nuclear fission. Together with Niels Bohr and others, he was instrumental in clarifying the role of Uranium 235 for the possibility of nuclear chain reaction.During his stay in Landau's circle in Kharkiv around 1937, Placzek witnessed the brutal reality of Joseph Stalin's regime. His first-hand experience of this influenced the political opinions of his close friends, in particular, fathers of nuclear and thermonuclear bombs, Robert Oppenheimer and Edward Teller. Later, Placzek was the only Czech with a leading position in the Manhattan project, where he worked from 1943 till 1946 as a member of the British Mission; first in Canada as the leader of a theoretical division at the Montreal Laboratory and then (since May 1945) in Los Alamos, later replacing his friend Hans Bethe as the leader of the theoretical group. Since 1948, Placzek was a member of the Institute for Advanced Study in Princeton, USA.
Unlike many trailblazers of nuclear physics, George Placzek did not leave his recollections or life story notes. Many new facts about Placzek's life and his family roots emerged in connection with a Symposium held in Placzek's memory.
Placzek's premature death in a hotel in Zurich was very likely a suicide influenced by his long-time serious illness. The first detailed biography of George Placzek sheds light on poorly known pages of his life, illuminating also circumstances of Placzek's death.Harris Mayer
Harris L. Mayer (born 1921) is an American physicist known for his collaboration with Edward Teller and John von Neumann. He worked on the Manhattan Project. Mayer also worked on Project Orion. His work had to do with opacity, mostly in the context of atmospheric opacity to nuclear radiation.History of the Teller–Ulam design
This article chronicles the history and origins of the Teller–Ulam design, the technical concept behind modern thermonuclear weapons, also known as hydrogen bombs. This design, the details of which are military secrets known to only a handful of major nations, is believed to be used in virtually all modern nuclear weapons which make up the arsenals of the major nuclear powers.Inglis–Teller equation
The Inglis–Teller equation represents an approximate relationship between an energy level and the electron number density. This equation is related to the Stark effect in which spectral lines are split explicitly due to the presence of an electric field. The equation was derived by David R. Inglis and Edward Teller in 1939.
The equation is directly related to astrophysics as the electron densities of stars are determined using this equation. Since the Stark effect shifts spectral lines, for some energy level n, the splitting is equal to the difference between the adjoining energy level. Beyond this level, spectral lines merge.
Electron density and the merging energy level relationship for hydrogen atom is given by;
where, Ni= no: of positive ions per cm3, Ne= no: of negative electrons per cm3, nm= last observable energy level of the Balmer series.Jahn–Teller effect
The Jahn–Teller effect (JT effect or JTE) is an important mechanism of spontaneous symmetry breaking in molecular and solid-state systems which has far-reaching consequences in different fields, and is responsible for a variety of phenomena in spectroscopy, stereochemistry, crystal chemistry, molecular and solid-state physics, and materials science. The effect is named for Hermann Arthur Jahn and Edward Teller, who first reported studies about it in 1937.Jewish quota
A Jewish quota was a racial quota limiting the number of Jews in various establishments to a certain percentage. In particular, in the 19th and 20th centuries, some countries had Jewish quotas in higher education.
Jewish educational quotas could be statewide law or adopted only in certain institutions, often unofficially. The limitation took the form of total prohibition of Jewish students, or of limiting the number of Jewish students so that their share in the students' population would not be larger than their share in the general population. In some establishments, the Jewish quota placed a limit on growth rather than set a fixed level of participation to be achieved.
Jews who wanted an education used various ways to overcome this discrimination: bribing the authorities, changing their religion, or traveling to countries without such limitations. In Hungary, for example, 5,000 Jewish youngsters (including Edward Teller) left the country after the introduction of numerus clausus.Late talker
Late talker is a term used for exceptionally bright people who experience a delay in the development of speech. Commonalities include usually being boys, delayed speech development, highly educated parents, musically gifted families, puzzle-solving abilities, and lagging social development. Many high-achieving late talkers were notoriously strong willed and noncompliant as children.Late talkers can often be misdiagnosed early on as having severe ("low-functioning" or nonverbal) autism spectrum disorder (a category known simply as "autism", prior to the DSM-5), and careful professional evaluation is necessary for differential diagnosis, according to Darold Treffert and other experts. One major difference between late talkers and low-functioning autistic children is that for late talkers, communication skills automatically reach a normal level and the child requires no further special treatment with regards to speech. Outlook for late talkers with or without intervention is generally favorable. However, late language emergence can also be an early or secondary sign of an autism spectrum disorder, or other developmental disorders, such as attention deficit hyperactivity disorder, intellectual disability, learning disability, social communication disorder, or specific language impairment.Einstein syndrome, a term coined by the economist Thomas Sowell, is also sometimes used to describe late talkers. The term is named after Albert Einstein (often said to have been a late talker, though with questionable evidence), whom Sowell used as the primary example of a late talker in his work. Sowell also included Edward Teller, the mathematicians Srinivasa Ramanujan, Julia Robinson, physicist Richard Feynman, and the pianists Clara Schumann and Arthur Rubinstein to be in the late talkers group. As a toddler, the scientist John Clive Ward showed similar behavioral traits to those described by Sowell, according to a brief sketch of his biography.
Sowell claimed late talkers are often inaccurately categorized as having an autism spectrum disorder (ASD), and that a small subset of late talkers are highly intelligent children with common characteristics concentrated in music, memory, math or the sciences.Mark 14 nuclear bomb
For the Sinclair Research Ltd. SC/MP based computer system see MK14. For the torpedo see Mark 14 torpedo.
The Mark 14 nuclear bomb was a 1950s Strategic thermonuclear weapon, the first solid-fuel staged hydrogen bomb. It was an experimental design, and only five units were produced in early 1954. It was tested in April 1954 during the Castle Union nuclear test and had a yield of 6.9 Mt. The bomb is often listed as the TX-14 (for "experimental") or EC-14 (for "Emergency Capability"). It has also been referred to as the "Alarm Clock" device though it has nothing to do with the design by the same name proposed earlier by Edward Teller and known as the Sloika in the Soviet Union.
The fusion fuel used by the bomb was 95% enriched Lithium isotope 6 lithium deuteride, which at the time was a scarce resource and chiefly responsible for its limited deployment. The Castle Bravo test showed that unenriched Lithium isotope 7 functioned as well for nuclear fusion reactions as isotope 6. The Mk-14 bomb had a diameter of 61.4 inches (1.56 m) and a length of 222 inches (5.64 m). They weighed between 28,950 and 31,000 pounds (13,100 and 14,100 kg), and used a 64 feet (20 m) parachute.The version tested at Castle Union used a RACER IV primary, which resulted in 5 Mt of its total yield coming from fission, making it a very "dirty" weapon.By 1956, the components of all five of the produced Mk-14 bombs had been recycled into Mark 17s.Pöschl–Teller potential
In mathematical physics, a Pöschl–Teller potential, named after the physicists Herta Pöschl (credited as G. Pöschl) and Edward Teller, is a special class of potentials for which the one-dimensional Schrödinger equation can be solved in terms of special functions.Renner–Teller effect
The Renner–Teller effect or Renner effect is an effect due to rovibronic coupling on the electronic spectra of three- (or more) atomic linear molecules in degenerate electronic (Π, Δ, ..., etc.) states.
In its original formulation, the Renner–Teller effect was a vibronic coupling between the motions of the electrons and the nuclear vibrations in triatomic linear molecules. The article by Rudolf Renner (1934)  was the first that considered dynamic effects that go beyond the Born–Oppenheimer approximation, in which the nuclear and electronic motions in a molecule are uncoupled. This is a good approximation when the electronic energies are well separated. However, in linear molecules many of the electronic states are two-fold degenerate due to C∞v or D∞h symmetry, and the Born–Oppenheimer approximation breaks down. Since the best-known linear triatomic molecule (CO2) is electronically non-degenerate in its ground state, Renner chose the electronically excited two-fold degenerate Π-state of this well-known molecule as a model for his studies. The products of purely electronic and purely nuclear vibrational states served as the zeroth-order (no vibronic coupling) wave functions in Renner's study. The vibronic coupling acts as a perturbation.
Because Renner is the only author of the 1934 paper that first described the effect, it was long called the Renner effect. However,
in 1933 Gerhard Herzberg and Edward Teller had recognized that the potential of a triatomic linear molecule in a degenerate electronic state splits into two when the molecule is bent . A year later this effect was worked out in detail by Renner . Herzberg refers to this as the “Renner-Teller” effect in one of his influential books , and this name is most commonly used, although it might be more appropriate to speak of the “Renner-Herzberg” or “Renner-Herzberg-Teller” effect as Herzberg was the first author on the 1933 paper.
While Renner's theoretical study concerned the linear triatomic molecule CO2, the first actual observation of the Renner–Teller effect was in the electronic absorption spectrum of NH2 and its isotopologue ND2 . In 1959 Dressler and Ramsay found that the first electronically excited states of these triatomic molecules have a linear geometry and they observed in these excited states an unusual type of vibronic structure: the Renner–Teller effect.
Much has been published about the Renner–Teller effect after its first experimental observation in 1959. At present, authors referring to it have usually broader physical phenomena and molecules larger than three-atoms in mind. Usually one considers now effects not only due to the coupling of electrons with vibrations, but also electronic couplings with rotations (rovibronic coupling) .TRIGA
TRIGA (Training, Research, Isotopes, General Atomics) is a class of nuclear research reactor designed and manufactured by General Atomics. The design team for TRIGA, which included Edward Teller, was led by the physicist Freeman Dyson.Thermonuclear weapon
A thermonuclear weapon, or fusion weapon, is a second-generation nuclear weapon design which affords vastly greater destructive power than first-generation atomic bombs. Modern fusion weapons consist essentially of two main components: a nuclear fission primary stage (fueled by uranium-235 or plutonium-239) and a separate nuclear fusion secondary stage containing thermonuclear fuel: the heavy hydrogen isotopes deuterium and tritium, or in modern weapons lithium deuteride. For this reason, thermonuclear weapons are often colloquially called hydrogen bombs or H-bombs.A fusion explosion begins with the detonation of the fission primary stage. Its temperature soars past approximately one hundred million Kelvins, causing it to glow intensely with thermal x-radiation. These X-rays flood the void (the "radiation channel" often filled with polystyrene foam) between the primary and secondary assemblies placed within an enclosure called a radiation case, which confines the X-ray energy and resists getting pressed outwards. The distance separating the two assemblies ensures that debris fragments from the fission primary (which move much slower than X-ray photons) cannot disassemble the secondary before the fusion explosion runs to completion.
The secondary fusion stage–consisting of pusher/tamper, fusion fuel, and plutonium spark plug–is imploded by the X-ray energy pressing it inward. This compresses it and drives up the density of the plutonium spark plug at its center. The density of the plutonium fuel rises to such an extent that the spark plug is driven into a supercritical state, and it begins a nuclear fission chain reaction. The fission products so produced heat the highly compressed, and thus superdense, thermonuclear fuel surrounding the spark plug to the region of some three hundred million Kelvins, igniting fusion reactions between fusion fuel nuclei. In modern weapons fueled by lithium deuteride, the fissioning plutonium spark plug also emits free neutrons which collide with lithium nuclei and supply the tritium component of the thermonuclear fuel.
The radiation implosion mechanism exploits the temperature difference between the secondary stage's hot, surrounding radiation channel and its relatively cool interior. This temperature difference is briefly maintained by a massive heat barrier called the "pusher"/"tamper", which also serves as an implosion tamper, increasing and prolonging the compression of the secondary. If made of uranium, enriched uranium or plutonium, it can capture fusion neutrons produced by the fusion reaction and undergo fission itself, increasing the overall explosive yield. In addition to that, some designs also make the radiation case out of a fissile material that undergoes fission. As a result, such bombs get a third tertiary fission stage, and the majority of current Teller–Ulam are fission-fusion-fission weapons. Fission of the tamper or radiation case is the main contribution to the total yield and produces radioactive fission product fallout.The first full-scale thermonuclear test was carried out by the United States in 1952; the concept has since been employed by most of the world's nuclear powers in the design of their weapons. The design of all modern thermonuclear weapons in the United States is known as the Teller–Ulam configuration for its two chief contributors, Edward Teller and Stanislaw Ulam, who developed it in 1951 for the United States, with certain concepts developed with the contribution of physicist John von Neumann. Similar devices were developed by the Soviet Union, United Kingdom, France, and China.
As thermonuclear weapons represent the most efficient design for weapon energy yield in weapons with yields above 50 kilotons of TNT (210 TJ), virtually all the nuclear weapons of this size deployed by the five nuclear-weapon states under the Non-Proliferation Treaty today are thermonuclear weapons using the Teller–Ulam design.UC Davis Department of Applied Science
The Department of Applied Science at the University of California, Davis was a cooperative academic program involving the University of California, Davis and the Lawrence Livermore National Laboratory (LLNL). It was established in the fall of 1963 by Edward Teller, director of LLNL, and Roy Bainer, then dean of the UC Davis College of Engineering. The department was discontinued in 2011.
Founding members of the World Cultural Council