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Edward Condon

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From Wikipedia, the free encyclopedia
American nuclear physicist (1902–1974)
For the Irish nationalist, seeEdward O'Meagher Condon. For the Catholic journalist, seeThe Pillar.

Edward Condon
Edward Condon at NIST (c. 1945-1951)
4th Director ofNational Bureau of Standards
In office
1945–1951
PresidentHarry S. Truman
Preceded byLyman James Briggs
Succeeded byAllen V. Astin
Personal details
Born(1902-03-02)March 2, 1902
DiedMarch 26, 1974(1974-03-26) (aged 72)
EducationUniversity of California, Berkeley (BS,MS,PhD)
Scientific career
Known forCondon–Shortley phase
Franck–Condon principle
Slater–Condon rules
Nimatron
Quantum tunneling theory ofalpha decay
Radar andnuclear weapons research
Condon model
Target ofMcCarthyism
FieldsPhysics
Institutions
ThesisOn the theory of intensity distribution in band systems (1927)
Doctoral advisorRaymond Thayer Birge
Doctoral studentsEdwin McMillan
Other notable studentsWalter Kauzmann (postdoc)
James Stark Koehler (postdoc)
Richard Zare (postdoc)

Edward Uhler Condon (March 2, 1902 – March 26, 1974) was an Americannuclear physicist, a pioneer inquantum mechanics, and a participant during World War II in the development ofradar and, very briefly, ofnuclear weapons as part of theManhattan Project. TheFranck–Condon principle and theSlater–Condon rules are co-named after him.[1][2][3]

He was the fourth director of theNational Bureau of Standards (NIST) from 1945 to 1951. In 1946, Condon was president of theAmerican Physical Society, and in 1953 was president of theAmerican Association for the Advancement of Science.

During theMcCarthy period, Condon was one of the first prominent scientists to become a target of theHouse Un-American Activities Committee, charged publicly in 1948 with being "one of the weakest links in our atomic security" on account of his extensive knowledge ofclassified information, his connections with the development of the atomic bomb, and his alleged sympathies for communism and theSoviet Union. His case became acause célèbre among those who opposed McCarthyism, especially scientists, and was one of the most prominent cases of its time, and he was defended by many prominent scientists, as well as PresidentHarry Truman.[4]

Condon became widely known in 1968 as principal author of theCondon Report, an official review funded by theUnited States Air Force that concluded thatunidentified flying objects (UFOs) have prosaic explanations. The lunar craterCondon is named for him.

Background

[edit]
Figure 1.Franck–Condon principle energy diagram. Since electronic transitions are very fast compared with nuclear motions, vibrational levels are favored when they correspond to a minimal change in the nuclear coordinates. Thepotential wells are shown favoring transitions betweenv = 0 andv = 2

Edward Uhler Condon was born on March 2, 1902, inAlamogordo, New Mexico, to William Edward Condon and Carolyn Uhler. His father was supervising the construction of a narrow-gauge railroad,[5][6] many of which were built in the area by logging companies. After graduating from high school inOakland, California in 1918, he worked as a journalist for three years at theOakland Inquirer and other papers.[5] He was of Irish descent.[7]

He then attended theUniversity of California, Berkeley, initially joining the College of Chemistry; when he learned that his high school physics teacher had joined the faculty, he switched majors to take classes in theoretical physics.[8] Condon earned his bachelor's degree in three years and his doctorate in two.[5] His Ph.D. thesis combined work byRaymond Thayer Birge on measuring and analyzing band spectral intensities and a suggestion byJames Franck.[9][10]

Thanks to aNational Research Council fellowship, Condon studied at Göttingen underMax Born and at Munich underArnold Sommerfeld. Under the latter, Condon rewrote his Ph.D. thesis usingquantum mechanics, creating theFranck–Condon principle.[9] After seeing an ad inPhysical Review, Condon worked in public relations atBell Telephone Laboratories in fall 1927, in particular promoting their discovery ofelectron diffraction.[5][11]While working at Bell Telephone Laboratories he also analyzed the frequency of word usage and related the results to theWeber–Fechner law in psychology.[12]

Career

[edit]

Early career

[edit]
Arnold Sommerfeld,Germantheoretical physicist taught Condon during the 1920s

Condon taught briefly atColumbia University and was associate professor of physics atPrinceton University from 1928 to 1937,[5] except for a year at theUniversity of Minnesota.[13] WithPhilip M. Morse, he wroteQuantum Mechanics, the first English-language text on the subject in 1929. With G.H. Shortley, he wrote theTheory of Atomic Spectra, "a bible on the subject from the moment of its 1935 publication".[14][15][16][Note 1]

He was associate director of research at theWestinghouse Electric Company in Pittsburgh, beginning in 1937, where he established research programs innuclear physics,solid-state physics, andmass spectrometry. He then headed the company's research onmicrowave radar development.[13] He also worked on the equipment used to isolateuranium for use inatomic bombs.[5] He served as a consultant to the National Defense Research Committee during World War II and helped organizeMIT's Radiation Laboratory.[13][15] On May 11, 1940, Condon showcased the "Nimatron", an electro-mechanical machine for playingNim, at the 1940 New York World Fair.[18]

Government service

[edit]
J. Robert Oppenheimer (circa 1944) led theManhattan Project, on which Condon briefly served in the early 1940s during WWII

In 1943, Condon joined theManhattan Project. Within six weeks, he resigned as a result of conflicts about security withGeneral Leslie R. Groves, the project's military leader. General Groves had objected when Condon's superiorJ. Robert Oppenheimer held a discussion with the director of the project's Metallurgical Lab at theUniversity of Chicago.[19] In his resignation letter, he said he felt he would be more useful to the war effort by staying at Westinghouse, explaining that the security measures he found at Los Alamos so concerned him that he would become depressed and ineffective.[20] Condon was upset that Oppenheimer did not stand up to Groves, but he did not know that Oppenheimer had yet to receive his own security clearance.[19]

From August 1943 to February 1945, Condon worked as a part-time consultant at Berkeley on the separation ofU-235 and U-238.[21] Condon was elected to theNational Academy of Sciences in 1944.[16] In June 1945, Condon was among many prominent American scientists invited to attend a celebration of the 220th anniversary of the founding of theRussian Academy of Sciences to be held inMoscow. He indicated his desire to attend. When Groves learned of this, he contacted Condon's employers at Westinghouse, and explained that he believed this would be dangerous from the perspective of possibly revealing information about the atomic bomb work that was still on-going. Condon attempted to contact theWhite House in protest. Subsequently, Groves requested that theState Department revoke Condon'spassport, which they did.[22]

Following the war, Condon played a leading role in organizing scientists to lobby for civilian control of atomic energy rather than military control under strict security.[23] He worked as science adviser to SenatorBrien McMahon, chairman of the Senate Special Committee on Atomic Energy, which wrote theMcMahon-Douglas Act, enacted in August 1946, that created theAtomic Energy Commission, placing atomic energy under civilian control.[5][15][23] Adopting an internationalist viewpoint, Condon favored international scientific cooperation and joined the American-Soviet Science Society.[24] Condon was elected to theAmerican Academy of Arts and Sciences in 1947.[25]

U.S. Commerce Secretary (and former U.S. Vice President)Henry A. Wallace came to know Condon and in October 1945 recommended him as director of theNational Bureau of Standards (NBS, now known asNIST). PresidentHarry S. Truman agreed to nominate him. The Senate confirmed his nomination without opposition. Condon served as NBS director until 1951.[26][5][21] He was also president of theAmerican Physical Society in 1946.[15][16] Condon was also either a member or associated with theIndependent Citizens Committee of the Arts, Sciences and Professions (ICCASP).[27] He was elected to theAmerican Philosophical Society in 1949.[28]

Attacks

[edit]

1940s

[edit]
J. Edgar Hoover claimed Condon took part in a "Soviet network" in a 1946 letter

During the 1940s, Condon's security clearance status was repeatedly questioned, reviewed, and re-established.

On May 29, 1946, FBI DirectorJ. Edgar Hoover wrote a letter intended for President Truman that named several senior government officials as part of a Soviet network. It described Condon as "nothing more or less than an espionage agent in disguise". (Decades later SenatorDaniel Patrick Moynihan called it "baseless corridor talk".) The Truman administration ignored Hoover's charges.[29]

On March 21, 1947, Truman signed United StatesExecutive Order 9835 AKA the "Loyalty Order".[30] In the same month, CongressmanJ. Parnell Thomas, head of theHouse Un-American Activities Committee (HUAC), furnished information to theWashington Times-Herald that denigrated his loyalty in two articles published.[31][32] Thomas had several reasons to make a prominent case of Condon. He had no sympathy for the scientific community's international spirit in the first place and could use the ongoing controversy to argue for an increase in his committee's appropriation, to bolster opposition to the Condon-supported McMahon Act, and to attract favorable coverage during election season.[33] The Department of Commerce cleared Condon of disloyalty charges on February 24, 1948.[34]

J. Parnell Thomas (1939) attacked Condon's reputation in 1947 and 1948

Nevertheless, a HUAC report dated March 2, 1948 stated, "It appears that Dr. Condon is one of the weakest links in our atomic security."[32][35] Condon responded: "If it is true that I am one of the weakest links in atomic security that is very gratifying and the country can feel absolutely safe for I am completely reliable, loyal, conscientious and devoted to the interests of my country, as my whole life and career clearly reveal."[36] On March 3, 1948, SenatorDennis Chávez (Dem-NM) read into theCongressional Record an article byMarquis Childs, which suggested that the committee actions against Condon were based on flimsy evidence and may have been motivated by political differences withHenry Wallace, the formerSecretary of Commerce who appointed Condon to head the Bureau of Standards.[37]

On March 5, 1948, RepresentativeGeorge MacKinnon (Rep-MN) stated: "Mr. Speaker, today's paper carries the story that the Secretary of Commerce, Mr.[W. Averell] Harriman, has refused to respond to a congressional subpoena to supply information with respect to one Dr. Condon. I am not presuming to pass on the facts in that case, but I do wish to point out that this follows the same pattern of Secrecy as the administration has been following with respect to congressional subpoenas throughout this entire session."[35] On March 6, 1948, aWashington Post editorial stated, "There is an abundance of precedent for the Secretary's refusal to turn over his department's loyalty board files on Dr. Edward U. Condon." ThePost also objected to an alternative proposal to send files on the Condon case to the top-level "Loyalty Review Board" in the Civil Service Commission. The Commerce Department's own loyalty board had already cleared Condon, and thePost argued that this decision should stand.[38] On March 8, 1948, RepresentativeChester E. Holifield (Dem-CA) noted: "... calling the attention of the Members to H. R. 4641, a bill which I introduced December 4, 1947. The purpose of this bill is to prescribe the procedures of investigating committees of the Congress and to protect the rights of parties under investigation by such committees. If this bill could be enacted, it would extend to a world-famous scientist, such as Dr. E. U. Condon, the same protection which is now available to a chicken thief or a traffic violator; that is, the right of defense against his accusers. Character assassination under the cloak of congressional immunity by a Member of Congress or a Congressional committee is a dangerous and abominable travesty."[35] On March 9, 1948, RepresentativeGlen H. Taylor (Dem-ID), thenProgressive Party vice presidential candidate, RepresentativeEmanuel Celler (Dem-NY), RepresentativeLeo Isacson (ALP-NY) all condemn the recurring attacks on Condon by the Committee.[35]

Albert Einstein (1947) defended Condon

Defenders includedAlbert Einstein andHarold Urey. The entire physics department of Harvard and numerous professional organizations wrote Truman on Condon's behalf.[39] The Emergency Committee of Atomic Scientists held a dinner on April 12, 1948, to demonstrate support, with nine Nobel Prize winners among the sponsors.[40] The National Academy of Sciences, by contrast, considered only a statement criticizing HUAC's procedures rather than defending Condon. Despite widespread support among its members (275 to 35), the National Academy of Sciences' leadership did not release a statement, and instead opted to speak privately with Rep. Thomas.[41] On July 15, 1948, the Atomic Energy Commission granted Condon a security clearance, allowing him to access classified information at NIST.[42]

In September 1948, at the Annual Meeting of theAmerican Association for the Advancement of Science (AAAS), President Truman, with Condon sitting nearby on the dais, denounced Rep. Thomas and HUAC on the grounds that vital scientific research "may be made impossible by the creation of an atmosphere in which no man feels safe against the public airing of unfounded rumors, gossip and vilification". He called HUAC's activities "the most un-American thing we have to contend with today. It is the climate of a totalitarian country".[5] Condon opposed any cooperation with Congressional attempts to identify security risks within the scientific community. In June 1949, in a sharply critical letter to Oppenheimer, who had provided information to HUAC about a colleague, he wrote: "I have lost a good deal of sleep trying to figure out how you could have talked this way about a man whom you have known for so long, and of whom you know so well what a good physicist and good citizen he is."[19] In July 1949, he testified before a Senate subcommittee that was considering rules governing the operation of Senate committees. He criticized Thomas and the HUAC for holding closed hearings and then leaking information that denigrated his loyalty and that of other scientists. He said that the committee denied his and his colleagues' requests for public hearings so they could respond.[43]

In 1949,Edward R. Murrow had colleagueDon Hollenbeck contribute to the innovative media-review program,CBS Views the Press over the radio network's flagship stationWCBS. Hollenbeck discussedEdward U. Condon,Alger Hiss, andPaul Robeson.[44] Regarding Condon, Hollenbeck critiqued anti-communists for going about their business the wrong way:

Communists want nothing more than to be lumped with freedom-loving non-Communists [like Condon] ... This simply makes it easier for them to conceal their true nature, and to allege that the term 'Communist' is meaningless ... At the same time, we cannot let abuses deter us from the legitimate exposing of real Communists.[44]

1950s

[edit]
PresidentHarry S. Truman (here, signing a proclamation declaring a national emergency and authorizing U.S. entry into theKorean War) nominated Condon as NBS director in 1945

With his record finally cleared in 1951, Condon left government to become head of research and development for theCorning Glass Works. He said his $14,000 annual government salary was his reason for the move. President Truman issued a statement of praise: "You have served in a most critical position with continued and loyal attention to your duties as director, and by reason of your standing among scientists and the supervision you have given to the bureau's activities, you have made of it a more important agency than it has ever been before". Two Republican Congressmen asserted that Condon was being investigated as a security risk and was leaving "under fire", a charge the Secretary of CommerceCharles Sawyer denied.[45]

In 1951, Condon served as president of thePhilosophical Society of Washington.[46] On December 27, 1951, Condon was elected to head theAAAS in 1953.[47][48][Note 2] In September 1952, Condon, in testimony before a Congressional committee, had his first opportunity to deny under oath all charges of disloyalty that had been made against him.[31] The HUAC concluded in its annual report for 1952 that Condon was unsuited for a security clearance because of his "propensity for associating with persons disloyal or of questionable loyalty and his contempt for necessary security regulations".[49] On December 30, 1952, Condon assumed the presidency of the AAAS at its annual meeting, where, according to theBulletin of the Atomic Scientists, "The tremendous ovation by his fellow members accompanying his induction was a further affirmation of their faith in his loyalty and integrity".[48]

Five months later Condon's clearance was revoked as was standard when someone left government service.[31][48] He was granted a security clearance once more on July 12, 1954. It was announced on October 19 and then suspended by Secretary of the NavyCharles S. Thomas on October 21.[31] Vice President Nixon took credit for the suspension, and the Atomic Scientists of Chicago charged "political abuse of the national security system", though Secretary Thomas denied Nixon had played a role.[50][51] Condon withdrew his application for clearance and in December resigned from Corning because the company was seeking government research contracts and he lacked the clearance necessary for participating in military research. After citing the security reviews he had passed over the years, he said: "I am unwilling to continue a potentially indefinite series of reviews and re-reviews".[31] Corning had paid Condon's clearance-related legal expenses while he worked there.[52]

In 1958, Condon wrote that his decision reflected his belief that theEisenhower administration "was committed by policy to the persecution of scientists, or, at the very least, to a callous indifference toward what others were doing to attack and discredit them. I decided the situation was hopeless, and that I had done all that could be reasonably expected of me in having resisted these forces for seven long years".[53]

Carl Sagan recounted a Loyalty Review Board encounter with Condon

Years later,Carl Sagan reported how Condon described one encounter with a loyalty review board. A board member stated his concern: "Dr. Condon, it says here that you have been at the forefront of a revolutionary movement in physics called ... quantum mechanics. It strikes this hearing that if you could be at the forefront of one revolutionary movement ... you could be at the forefront of another". Condon said he replied: "I believe in Archimedes' Principle, formulated in the third century B.C. I believe in Kepler's laws of planetary motion, discovered in the seventeenth century. I believe in Newton's laws ..." and continued with a catalog of scientists from earlier centuries, including theBernoulli,Fourier,Ampère,Boltzmann, andMaxwell.[54] He once said privately: "I join every organization that seems to have noble goals. I don't ask whether it contains Communists."[55]

Academia

[edit]

Condon was professor of physics atWashington University in St. Louis from 1956 to 1963 and then at theUniversity of Colorado Boulder from 1963, where he was also a fellow of theJoint Institute for Laboratory Astrophysics, until retiring in 1970.[5]

From 1966 to 1968, Condon directed Boulder's UFO Project, known as theCondon Committee. He was chosen for his eminence and his lack of any stated position on UFOs. He later wrote that he agreed to head the project "on the basis of appeals to duty to do a needed public service" on the part of the U.S. Air Force Office of Scientific Research.[56] Its 1968 final report – which drew onProject Blue Book information from the USAF, as well as reports collected by two civilian organisations – concluded thatunidentified flying objects had prosaic explanations.[57]

Condon was also president of theAmerican Institute of Physics[5] and theAmerican Association of Physics Teachers in 1964.[15] He was President of theSociety for Social Responsibility in Science (1968–69) and was Co-Chair of the National Committee for a Sane Nuclear Policy (1970).[15] He co-edited theHandbook of Physics withHugh Odishaw of theUniversity of Arizona.[5] He received theFrederic Ives Medal awarded by theOptical Society in 1968.[58] On his retirement, his colleagues honored him with the publication of aFestschrift.[59]

Global policy

[edit]

He was one of the signatories of the agreement to convene a convention for drafting aworld constitution.[60][61] As a result, for the first time in human history, aWorld Constituent Assembly convened to draft and adopt theConstitution for the Federation of Earth.[62]

Personal life and death

[edit]

In 1922, Condon married Chicago-born Emilie/Emma Honzik (1899–1974), who was a translator from the Czech language. They had two sons and a daughter.[63] Their sonJoseph Henry Condon (February 15, 1935 – January 2, 2012) was a physicist (Ph.D.,Northwestern University) and engineer, who worked atBell Labs ondigital telephone switches and co-invented theBelle chess computer.[63]

Condon was a Quaker, and a self-described "liberal".[26]

Condon died on March 26, 1974, twenty-four days after his 72nd birthday, in Boulder Colorado Community Hospital.[5] His wife Emma died just over 7 months later.[64]

Legacy

[edit]
Condon crater fromLunar Orbiter 1 (NASA/L&PI image)

TheNational Institute of Standards and Technology (NIST) gives an annual award named for Condon. The Condon Award recognizes distinguished achievements in written exposition in science and technology at NIST. The award was initiated in 1974.[65]

The craterCondon on the Moon is named in his honor.[66]

Condon's colleagueLewis Branscomb said of him, "Watergate came as no surprise to Edward Condon, nor did its aftermath. I imagine he would like to have lived to see the outcome of the impeachment inquiry. But Condon understood and paid his share of the price of liberty. Somehow his idealism, his sense of humor and his inexhaustible energy made his relentless quest for a better world look like optimism."[67][68]

In the 2023 filmOppenheimer, directed byChristopher Nolan, Condon was portrayed by actorOlli Haaskivi.[69]

Selected publications

[edit]

See also

[edit]

Notes

[edit]
  1. ^Some sources dateThe Theory of Atomic Spectra to 1936, but facsimile editions establish 1935 as the correct copyright date, along with Wheeler.[17]
  2. ^The New York Times says he was to be president of the organization in 1954, but Wang, "Security", 265, establishes that the term was 1953.[47][48]

References

[edit]
  1. ^Edward CondonArchived November 5, 2013, at theWayback Machine was elected as a member of theUS National Academy of Sciences in 1944.
  2. ^"APS Fellow Archive".www.aps.org.Archived from the original on March 3, 2016. RetrievedApril 22, 2018.
  3. ^Branscomb, Lewis M. (June 1974)."Edward Uhler Condon".Physics Today.27 (6):68–70.Bibcode:1974PhT....27f..68B.doi:10.1063/1.3128661.
  4. ^Wang 1992, pp. 238, 249, 256fn47
  5. ^abcdefghijklmM'Ehle, Victor K. (March 27, 1974)."Edward Condon, Leader In A-Bomb Creation, Dies".The New York Times. Archived fromthe original on November 6, 2012. RetrievedOctober 16, 2012.
  6. ^Morse 1976, p. 125
  7. ^Federal Bureau of Investigation.Edward Uhler Condon.
  8. ^Morse 1976, p. 126
  9. ^abMorse 1976, p. 127
  10. ^Condon, Edward Uhler (1927).On the theory of intensity distribution in band systems (Ph.D. thesis).University of California, Berkeley.OCLC 21068286.ProQuest 301737248. RetrievedMay 15, 2019.
  11. ^Morse 1976, p. 128
  12. ^Edward Condon (March 1, 1928)."Statistics of Vocabulary".Science.67 (1733): 300.doi:10.1126/SCIENCE.67.1733.300.ISSN 0036-8075.PMID 17782935.Wikidata Q81031549.
  13. ^abcWang 1992, p. 242
  14. ^Wheeler 1998, p. 122
  15. ^abcdefBranscomb, Lewis M."Edward U. Condon, 1902–1974".Washington University Library. Archived fromthe original on January 5, 2013. RetrievedOctober 16, 2012.
  16. ^abcWang 1992, p. 241
  17. ^Condon, E. U.; Shortley, G. H. (1935).The Theory of Atomic Spectra. Cambridge University Press.ISBN 978-0521092098.Archived from the original on June 27, 2014. RetrievedMarch 31, 2016.{{cite book}}:ISBN / Date incompatibility (help)
  18. ^"1940: Nimatron".platinumpiotr.blogspot.com.Archived from the original on December 25, 2018. RetrievedApril 22, 2018.
  19. ^abcBird & Sherwin 2005, pp. 223–224
  20. ^Kelly, Cynthia C., ed. (2007).The Manhattan Project: The Birth of the Atomic Bomb in the Words of its Creators, Eyewitnesses, and Historians. Atomic Heritage Foundation. pp. 137–138.
  21. ^abWang 1992, p. 243
  22. ^Wang 1992, pp. 262–263
  23. ^abWang 1992, pp. 243–234
  24. ^Wang 1992, pp. 244, 244n15
  25. ^"Edward Uhler Condon".American Academy of Arts & Sciences. February 9, 2023. RetrievedMarch 2, 2023.
  26. ^abWang 2001.
  27. ^"Edward U. Condon Papers". American Philosophical Society. 1998. RetrievedOctober 20, 2019.
  28. ^"APS Member History".search.amphilsoc.org. RetrievedMarch 2, 2023.
  29. ^Moynihan,Secrecy, 63–68
  30. ^Harry S. Truman, Executive OrdersArchived December 31, 2017, at theWayback MachineThe Federal Register, U.S. National Archives
  31. ^abcde"Condon Abandons Clearance Fight".The New York Times. December 14, 1954.Archived from the original on July 22, 2018. RetrievedOctober 16, 2012.
  32. ^abWang 1992, p. 246
  33. ^Wang 1992, pp. 252–255
  34. ^Proceedings and Debates of the 80th Congress, Second Session.Congressional Record. Vol. 94. United States Government Printing Office. 1948. p. 4779.
  35. ^abcdCongressional Record. US GPO. March 1948. pp. 1987 (Rankin report), 2018 (Chavez statement), 2222 (MacKinnon statement), 2337 (HR 4641 / Holifield), 2389 (Taylor), 2405 (Celler, Rankin), 2407 (Isacson), 2407–2408 (Holifield). RetrievedOctober 20, 2019.
  36. ^Wang 1992, pp. 248–249
  37. ^Childs, Marquis (March 3, 1948)."Washington Calling: Smear Against Condon".Washington Post. p. 2018. RetrievedOctober 20, 2019.
  38. ^"Loyalty Files".Washington Post. March 6, 1948. p. 8.
  39. ^Wang 1992, p. 249
  40. ^Wang 1992, pp. 249–250
  41. ^Wang 1992, p. 251
  42. ^Wang 1992, p. 255
  43. ^Knowles, Clayton (August 21, 1949)."Condon Hits 'Leaks' in House Inquiries".The New York Times.Archived from the original on July 22, 2018. RetrievedOctober 16, 2012.
  44. ^abGhiglione, Loren (2008).CBS's Don Hollenbeck: An Honest Reporter in the Age of McCarthyism. Columbia University Press. pp. 146–147 (Condon), 147 (Counterattack), 148–149 (Hiss), 149–150 (Robeson).ISBN 978-0231516891. RetrievedSeptember 10, 2015.Hiss Chambers.
  45. ^"Dr. Condon Resigns for Larger Salary".The New York Times. August 11, 1951.Archived from the original on November 6, 2012. RetrievedOctober 16, 2012.
  46. ^Condon, Edward. (1960). "Sixty Years of Quantum Physics".Bulletin of the Philosophical Society of Washington, Vol 16, p. 83.
  47. ^ab"Dr. Condon Chosen to Head Scientists".The New York Times. December 28, 1951.Archived from the original on March 16, 2017. RetrievedOctober 16, 2012.
  48. ^abcdWang 1992, p. 265
  49. ^Wang 1992, pp. 264–265
  50. ^"Nixon Warns Foes of Reds in Party".The New York Times. October 23, 1954.Archived from the original on July 22, 2018. RetrievedOctober 16, 2012.
  51. ^"Nixon Remarks Cited on Condon Case Role".The New York Times. December 17, 1954.Archived from the original on July 22, 2018. RetrievedOctober 16, 2012.
  52. ^Bird & Sherwin 2005, p. 460.
  53. ^Wang 1992, p. 266
  54. ^Sagan 1996, pp. 248–249
  55. ^Wheeler 1998, p. 113
  56. ^Dick 1996, p. 293
  57. ^"A Sledgehammer for Nuts".Nature. Vol. 221. March 8, 1969. pp. 899–900.doi:10.1038/221899a0.
  58. ^"Frederic Ives Medal / Quinn Prize".Optical Society.Archived from the original on February 1, 2014. RetrievedOctober 16, 2012.
  59. ^Brittin, Wesley E.; Odabasi, Halis, eds. (1971).Topics in Modern Physics: A Tribute to Edward U. Condon. London: Hilger.
  60. ^"Letters from Thane Read asking Helen Keller to sign the World Constitution for world peace. 1961".Helen Keller Archive. American Foundation for the Blind. RetrievedJuly 1, 2023.
  61. ^"Letter from World Constitution Coordinating Committee to Helen, enclosing current materials".Helen Keller Archive. American Foundation for the Blind. RetrievedJuly 3, 2023.
  62. ^"Preparing earth constitution | Global Strategies & Solutions".The Encyclopedia of World Problems | Union of International Associations (UIA). Archived fromthe original on July 19, 2023. RetrievedJuly 15, 2023.
  63. ^ab"Creator of Belle computer chess dies at 76".NJ.com. March 2, 2012.Archived from the original on December 17, 2014. RetrievedNovember 17, 2014.
  64. ^"Mrs. Edward Condon".The New York Times. November 4, 1974. p. 40.
  65. ^"Physics Lab: 2005–2007: Awards and Honors".NIST. Archived fromthe original on February 2, 2014. RetrievedOctober 16, 2012.
  66. ^"Condon".Gazetteer of Planetary Nomenclature.International Astronomical Union.Archived from the original on July 13, 2012. RetrievedOctober 16, 2012.
  67. ^Morse 1976, p. 143
  68. ^Branscomb, Lewis M. (1974). "Edward Uhler Condon".Physics Today.27 (6):68–70.doi:10.1063/1.3128661.
  69. ^Tinoco, Armando (August 29, 2023)."Christopher Nolan Cut 'Oppenheimer' Filming To 57 Days To Recreate Los Alamos".Deadline. RetrievedMay 31, 2025.
  70. ^Judd, B. R. (1975). "Perspectives onThe Theory of Atomic Spectra". In Putlitz, G.; Weber, E. W.; Winnacker, A. (eds.).Atomic Physics 4. Plenum Press. pp. 13–17.doi:10.1007/978-1-4684-2964-0_3.ISBN 978-1-4684-2966-4.
  71. ^"Halis Odabaşı's biography".Archived from the original on February 20, 2020. RetrievedFebruary 2, 2020.
  72. ^Collins, P. D. B. (1981). "Book reviews:Atomic Structure".Physics Bulletin.32: 80.doi:10.1088/0031-9112/32/3/035.

Works cited

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