Isidor Isaac Rabi

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Isidor Isaac Rabi
Head and shoulders of man in suit and tie wearing glasses
Rabi in 1944
Chairman of the President's Science Advisory Committee
In office
1956–1957
PresidentDwight D. Eisenhower
Preceded byLee DuBridge
Succeeded byJames Killian
Personal details
Born
Israel Isaac Rabi

(1898-07-29)July 29, 1898
Rymanów, Galicia, Austria-Hungary
(present-day Poland)
DiedJanuary 11, 1988(1988-01-11) (aged 89)
New York City, U.S.
Resting placeRiverside Cemetery (Saddle Brook, New Jersey)
Spouse
Helen Newmark
​
(m. 1926)​
Children2
Education
Known for
Awards
Signature
Scientific career
FieldsPhysics
Institutions
ThesisOn the principal magnetic susceptibilities of crystals (1927)
Doctoral advisorAlbert Potter Wills
Doctoral students

Isidor Isaac Rabi (

microwave radar and microwave ovens
.

Born into a traditional

Galicia, Rabi came to the United States as an infant and was raised in New York's Lower East Side. He entered Cornell University as an electrical engineering student in 1916, but soon switched to chemistry. Later, he became interested in physics. He continued his studies at Columbia University, where he was awarded his doctorate for a thesis on the magnetic susceptibility
of certain crystals. In 1927, he headed for Europe, where he met and worked with many of the finest physicists of the time.

In 1929, Rabi returned to the United States, where Columbia offered him a faculty position. In collaboration with

nuclear spin
of atoms earned him the Nobel Prize in Physics in 1944. Nuclear magnetic resonance became an important tool for nuclear physics and chemistry, and the subsequent development of magnetic resonance imaging from it has also made it important to the field of medicine.

During World War II he worked on

Radiation Laboratory (RadLab) and on the Manhattan Project. After the war, he served on the General Advisory Committee (GAC) of the Atomic Energy Commission, and was chairman from 1952 to 1956. He also served on the Science Advisory Committees (SACs) of the Office of Defense Mobilization and the Army's Ballistic Research Laboratory, and was Science Advisor to President Dwight D. Eisenhower. He was involved with the establishment of the Brookhaven National Laboratory in 1946, and later, as United States delegate to UNESCO, with the creation of CERN
in 1952. When Columbia created the rank of university professor in 1964, Rabi was the first to receive that position. A special chair was named after him in 1985. He retired from teaching in 1967, but remained active in the department and held the title of University Professor Emeritus and Special Lecturer until his death.

Early years

Israel Isaac Rabi was born on July 29, 1898, into a

anti-Semitism, he started writing his name as Isidor Isaac Rabi, and was known professionally as I.I. Rabi. To most of his friends and family, including his sister Gertrude, who was born in 1903, he was known simply by his last name. In 1907, the family moved to Brownsville, Brooklyn, where they ran a grocery store.[1]

As a boy, Rabi was interested in science. He read science books borrowed from the public library and built his own radio set. His first scientific paper, on the design of a

bookkeeper.[6]

Education

In 1922 Rabi returned to Cornell as a graduate chemistry student, and began studying physics. In 1923 he met, and began courting, Helen Newmark, a summer-semester student at

William Lawrence Bragg gave a seminar at Columbia about the electric susceptibility of certain crystals called Tutton's salts, Rabi decided to research their magnetic susceptibility, and Wills agreed to be his supervisor.[7]

Measuring the magnetic resonance of crystals first involved

Kariamanickam Srinivasa Krishnan, who used the method in his own investigations of crystals. Rabi concluded that he needed to promote his work as well as publish it.[8][9]

Like many other young physicists, Rabi was closely following momentous events in Europe. He was astounded by the Stern–Gerlach experiment, which convinced him of the validity of quantum mechanics. With Ralph Kronig, Francis Bitter, Mark Zemansky and others, he set out to extend the Schrödinger equation to symmetric top molecules and find the energy states of such a mechanical system. The problem was that none of them could solve the resulting equation, a second-order partial differential equation. Rabi found the answer in Ludwig Schlesinger's Einführung in die Theorie der Differentialgleichungen, which describes a method originally developed by Carl Gustav Jacob Jacobi. The equation had the form of a hypergeometric equation to which Jacobi had found a solution. Kronig and Rabi wrote up their result and sent it to Physical Review, which published it in 1927.[10][11]

Europe

In May 1927, Rabi was appointed a Barnard Fellow. This came with a

Howard Percy Robertson and Edward Condon. Sommerfeld accepted Rabi as a postdoctoral researcher. German physicists Rudolf Peierls and Hans Bethe were also working with Sommerfeld at the time, but the three Americans became especially close.[13]

On Wills' advice, Rabi traveled to

British Association for the Advancement of Science, where he heard Werner Heisenberg present a paper on quantum mechanics. Afterwards, Rabi moved to Copenhagen, where he volunteered to work for Niels Bohr. Bohr was on vacation, but Rabi went straight to work on calculating the magnetic susceptibility of molecular hydrogen. After Bohr returned in October, he arranged for Rabi and Yoshio Nishina to continue their work with Wolfgang Pauli at the University of Hamburg.[14]

Although he came to Hamburg to work with Pauli, Rabi found Otto Stern working there with two English-speaking postdoctoral fellows, Ronald Fraser and John Bradshaw Taylor. Rabi soon made friends with them, and became interested in their molecular beam experiments,[15] for which Stern would receive the Nobel Prize in Physics in 1943.[16] Their research involved non-uniform magnetic fields, which were difficult to manipulate and hard to measure accurately. Rabi devised a method of using a uniform field instead, with the molecular beam at a glancing angle, so the atoms would be deflected like light through a prism. This would be easier to use, and produce more accurate results. Encouraged by Stern, and greatly assisted by Taylor, Rabi managed to get his idea to work. On Stern's advice, Rabi wrote a letter about his results to Nature,[15] which published it in February 1929,[17] followed by a paper entitled Zur Methode der Ablenkung von Molekularstrahlen ("On the method of deflection of molecular beams") to Zeitschrift für Physik, where it was published in April.[18]

By this time the Barnard Fellowship had expired, and Rabi and Helen were living on a $182 ($3,200 in 2023 dollars

Leó Szilárd and Eugene Wigner.[19]

Molecular Beam Laboratory

Ernest O. Lawrence (left) and Enrico Fermi

On March 26, 1929, Rabi received an offer of a lectureship from Columbia, with an annual salary of $3,000. The dean of Columbia's physics department, George B. Pegram, was looking for a theoretical physicist to teach statistical mechanics and an advanced course in the new subject of quantum mechanics, and Heisenberg had recommended Rabi. Helen was now pregnant, so Rabi needed a regular job, and this job was in New York. He accepted, and returned to the United States in August on the SS President Roosevelt.[20] Rabi became the only Jewish faculty member at Columbia at the time.[21]

Rabi was a poor instructor.

Norman Ramsey considered Rabi's lectures "pretty dreadful",[22] while William Nierenberg felt that he was "simply an awful lecturer".[23] Despite his shortcomings as a lecturer, his influence was great. He inspired many of his students to pursue careers in physics, and some became famous.[24]

Rabi's first daughter, Helen Elizabeth, was born in September 1929.[25] A second girl, Margaret Joella, followed in 1934.[26] Between his teaching duties and his family, he had little time for research, and published no papers in his first year at Columbia, but was nonetheless promoted to assistant professor at its conclusion.[25] He became a professor in 1937.[27]

In 1931 Rabi returned to particle beam experiments. In collaboration with

nuclear spin of sodium. When the experiment was conducted, four beamlets were found, from which they deduced a nuclear spin of 3⁄2.[30]

Rabi's Molecular Beam Laboratory began to attract others, including

Jerrold Zacharias who, believing that the sodium nucleus would be too difficult to understand, proposed studying the simplest of the elements, hydrogen. Its deuterium isotope had only recently been discovered at Columbia in 1931 by Urey, who received the 1934 Nobel Prize in Chemistry for this work. Urey was able to supply them with both heavy water and gaseous deuterium for their experiments. Despite its simplicity, Stern's group in Hamburg had observed that hydrogen did not behave as predicted.[33] Urey also helped in another way; he gave Rabi half his prize money to fund the Molecular Beam Laboratory.[34] Other scientists whose careers began at the Molecular Beam Laboratory included Norman Ramsey, Julian Schwinger, Jerome Kellogg and Polykarp Kusch.[35] All were men; Rabi did not believe that women could be physicists. He never had a woman as a doctoral or postdoctoral student, and generally opposed women as candidates for faculty positions.[36]

At the suggestion of

neutron's magnetic moment could be inferred by subtracting the proton's magnetic moment from the deuteron's. The resulting value was not zero, and had a sign opposite to that of the proton. Based on curious artifacts of these more accurate measurements, Rabi suggested that the deuteron had an electric quadrupole moment.[44][45][46] This discovery meant that the physical shape of the deuteron was not symmetric, which provided valuable insight into the nature of the nuclear force binding nucleons. For the creation of the molecular-beam magnetic-resonance detection method, Rabi was awarded the Nobel Prize in Physics in 1944.[47]

See also: List of Jewish Nobel laureates

World War II

Birmingham University

In September 1940, Rabi became a member of the Scientific Advisory Committee of the U.S. Army's

Lee DuBridge to run it.[49]

Loomis and DuBridge recruited physicists for the new laboratory at an Applied Nuclear Physics conference at MIT in October 1940. Among those who volunteered was Rabi. His assignment was to study the magnetron, which was so secret that it had to be kept in a safe.[50] The Radiation Laboratory scientists set their sights on producing a microwave radar set by January 6, 1941, and having a prototype installed in a Douglas A-20 Havoc by March. This was done; the technological obstacles were gradually overcome, and a working US microwave radar set was produced. The magnetron was further developed on both sides of the Atlantic to permit a reduction in wavelength from 150 cm to 10 cm, and then to 3 cm. The laboratory went on to develop air-to-surface radar to detect submarines, the SCR-584 radar for fire control, and LORAN, a long-range radio navigation system.[51] At Rabi's instigation, a branch of the Radiation Laboratory was located at Columbia, with Rabi in charge.[52]

In 1942

Los Alamos Laboratory on a new secret project. They convinced Oppenheimer that his plan for a military laboratory would not work, since a scientific effort would need to be a civilian affair. The plan was modified, and the new laboratory would be a civilian one, run by the University of California under contract from the War Department. In the end, Rabi still did not go west, but did agree to serve as a consultant to the Manhattan Project.[53] Rabi attended the Trinity test in July 1945. The scientists working on Trinity set up a betting pool on the yield of the test, with predictions ranging from total dud to 45 kilotons of TNT equivalent (kt). Rabi arrived late and found the only entry left was for 18 kilotons, which he purchased.[54] Wearing welding goggles, he waited for the result with Ramsey and Enrico Fermi.[55] The blast was rated at 18.6 kilotons, and Rabi won the pool.[54]

Later life

In 1945, Rabi delivered the Richtmyer Memorial Lecture, held by the American Association of Physics Teachers in honor of Floyd K. Richtmyer, wherein he proposed that the magnetic resonance of atoms might be used as the basis of a clock. William L. Laurence wrote it up for The New York Times, under the headline "'Cosmic pendulum' for clock planned".[56][57][58] Before long Zacharias and Ramsey had built such atomic clocks.[59] Rabi actively pursued his research into magnetic resonance until about 1960, but he continued to make appearances at conferences and seminars until his death.[60][61]

Rabi with fellow Nobel Prize laureates John Bardeen (left) and Werner Heisenberg (right) in 1962

Rabi chaired Columbia's physics department from 1945 to 1949, during which time it was home to two Nobel laureates (Rabi and Enrico Fermi) and eleven future laureates, including seven faculty (Polykarp Kusch,

Martin L. Perl, a doctoral student of Rabi's, won the Nobel Prize in 1995.[63] Rabi was the Eugene Higgins professor of physics at Columbia but when Columbia created the rank of university professor in 1964, Rabi was the first to receive such a chair. This meant that he was free to research or teach whatever he chose.[64] He retired from teaching in 1967 but remained active in the department and held the title of University Professor Emeritus until his death.[65] A special chair was named after him in 1985.[66]

A legacy of the Manhattan Project was the network of

Major General Leslie R. Groves Jr., the director of the Manhattan Project, who was willing to go along with a new national laboratory, but only one. Moreover, while the Manhattan Project still had funds, the wartime organization was expected to be phased out when a new authority came into existence. After some bargaining and lobbying by Rabi and others, the two groups came together in January 1946. Eventually nine universities (Columbia, Cornell, Harvard, Johns Hopkins, MIT, Princeton, Pennsylvania, Rochester and Yale) came together, and on January 31, 1947, a contract was signed with the Atomic Energy Commission (AEC), which had replaced the Manhattan Project, that established the Brookhaven National Laboratory.[67]

Chen-Ning Yang
(seated, left)

Rabi suggested to Edoardo Amaldi that Brookhaven might be a model that Europeans could emulate. Rabi saw science as a way of inspiring and uniting a Europe that was still recovering from the war. An opportunity came in 1950 when he was named the United States Delegate to the United Nations Educational, Scientific and Cultural Organization (UNESCO). At a UNESCO meeting at the Palazzo Vecchio in Florence in June 1950, he called for the establishment of regional laboratories. These efforts bore fruit; in 1952, representatives of eleven countries came together to create the Conseil Européen pour la Recherche Nucléaire (CERN). Rabi received a letter from Bohr, Heisenberg, Amaldi and others congratulating him on the success of his efforts. He had the letter framed and hung it on the wall of his home office.[68]

Military matters

The

hydrogen bomb. Rabi went further than most of the other members, and joined Fermi in opposing the hydrogen bomb on moral as well as technical grounds.[70] However, President Harry S. Truman overrode the GAC's advice, and ordered development to proceed.[71]
Rabi later said:

I never forgave Truman for buckling under the pressure. He simply did not understand what it was about. As a matter of fact, after he stopped being President he still didn't believe that the Russians had a bomb in 1949. He said so. So for him to have alerted the world that we were going to make a hydrogen bomb at a time when we didn't even know how to make one was one of the worst things he could have done. It shows the dangers of this sort of thing.[72]

Oppenheimer was not reappointed to the GAC when his term expired in 1952, and Rabi succeeded him as chairman, serving until 1956.

controversial security hearing
in 1954 that led to Oppenheimer being stripped of his security clearance. Many witnesses supported Oppenheimer, but none more forcefully than Rabi:

So it didn't seem to me the sort of thing that called for this kind of proceeding... against a man who has accomplished what Dr. Oppenheimer has accomplished. There is a real positive record... We have an A-bomb and a whole series of it, and we have a whole series of super bombs, and what more do you want, mermaids?[74][75]

Rabi was appointed a member of the Science Advisory Committee (SAC) of the

Dwight Eisenhower met with the SAC on October 15, 1957, to seek advice on possible US responses to the Soviet satellite success. Rabi, who knew Eisenhower from the latter's time as president of Columbia, was the first to speak, and put forward a series of proposals, one of which was to strengthen the committee so it could provide the President with timely advice. This was done, and the SAC became the President's Science Advisory Committee a few weeks later. He also became Eisenhower's Science Advisor.[77] In 1956 Rabi attended the Project Nobska anti-submarine warfare conference, where discussion ranged from oceanography to nuclear weapons.[78] He served as the US Representative to the NATO Science Committee at the time that the term "software engineering" was coined. While serving in that capacity, he bemoaned the fact that many large software projects were delayed. This prompted discussions that led to the formation of a study group that organized the first conference on software engineering.[79]

Honors

In the course of his life, Rabi received many honors in addition to the Nobel Prize. These included the

National Academy of Sciences in 1985, the Golden Plate Award of the American Academy of Achievement[83] and the Vannevar Bush Award from the National Science Foundation in 1986.[81][84] He was a Fellow (elected 1931)[85] of the American Physical Society, serving as its president in 1950, and a member of the National Academy of Sciences, the American Philosophical Society, and the American Academy of Arts and Sciences. He was internationally recognized with membership in the Japan Academy and the Brazilian Academy of Sciences, and in 1959 was appointed a member of the board of governors of the Weizmann Institute of Science in Israel.[27] The most valuable of Columbia University's undergraduate research scholarships, designed to motivate and support promising young scientists, is named after him,[86] so is the street, Route Rabi at CERN, on the Prévessin
site in France.

Columbia University's I. I. Rabi Scholars program assists "some of Columbia College's most promising science students at the point of admission into the College."[87]

Death

Rabi died at his home on Riverside Drive in Manhattan from cancer on January 11, 1988.[66][60] His wife, Helen, survived him and died at the age of 102 on June 18, 2005.[88] In his last days, he was reminded of his greatest achievement when his physicians examined him using magnetic resonance imaging, a technology that had been developed from his ground-breaking research on magnetic resonance. The machine happened to have a reflective inner surface, and he remarked: "I saw myself in that machine... I never thought my work would come to this."[89]

In popular culture

Rabi was portrayed by Barry Dennen in the 1980 television miniseries Oppenheimer,[90] and by David Krumholtz in the 2023 film Oppenheimer.[91][92]

Books

  • Rabi, Isidor Isaac (1960). My Life and Times as a Physicist. Claremont, California:
    OCLC 1071412
    .
  • Rabi, Isidor Isaac;
    OCLC 223176672
    .
  • Rabi, Isidor Isaac (1970). Science: The Center of Culture. New York:
    OCLC 74630
    .

Notes

  1. ^ Rigden 1987, pp. 17–21.
  2. ^ Rigden 1987, p. 27.
  3. ^ Ramsey 1993, p. 312.
  4. ^ Rigden 1987, p. 23.
  5. ^ Rigden 1987, pp. 27–28.
  6. ^ Rigden 1987, pp. 33–34.
  7. ^ Rigden 1987, pp. 35–40.
  8. ^ Rigden 1987, pp. 41–45.
  9. ^ Rabi 1927, pp. 174–185.
  10. ^ Rigden 1987, pp. 50–53.
  11. ^ Kronig & Rabi 1928, pp. 262–269.
  12. ^ a b 1634–1699: McCusker, J. J. (1997). How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States: Addenda et Corrigenda (PDF). American Antiquarian Society. 1700–1799: McCusker, J. J. (1992). How Much Is That in Real Money? A Historical Price Index for Use as a Deflator of Money Values in the Economy of the United States (PDF). American Antiquarian Society. 1800–present: Federal Reserve Bank of Minneapolis. "Consumer Price Index (estimate) 1800–". Retrieved February 29, 2024.
  13. ^ Rigden 1987, pp. 55–57.
  14. ^ Rigden 1987, pp. 57–59.
  15. ^ a b Rigden 1987, pp. 60–62.
  16. ^ Toennies et al. 2011, p. 1066.
  17. ^ Rabi 1929, pp. 163–164.
  18. ^ Rabi 1929b, pp. 190–197.
  19. ^ Rigden 1987, pp. 65–67.
  20. ^ Rigden 1987, pp. 66–69.
  21. ^ Rigden 1987, p. 104.
  22. ^ a b Rigden 1987, p. 71.
  23. ^ Rigden 1987, p. 72.
  24. ^ Rigden 1987, pp. 71–72.
  25. ^ a b Rigden 1987, p. 70.
  26. ^ Rigden 1987, p. 83.
  27. ^ a b c "Isidor Isaac Rabi – Biographical". Nobel Media. Retrieved August 17, 2012.
  28. ^ Rigden 1987, p. 80.
  29. ISSN 0031-9228. Archived from the original
    on September 27, 2013.
  30. ^ Rigden 1987, pp. 84–88.
  31. ^ Millman 1977, p. 87.
  32. ^ Rigden 1987, pp. 88–89.
  33. ^ Goldstein 1992, pp. 21–22.
  34. ^ Rigden 1987, p. 90.
  35. ^ Goldstein 1992, p. 23.
  36. ^ Rigden 1987, p. 116.
  37. ^ Goldstein 1992, pp. 33–34.
  38. ^ Rabi et al. 1939, pp. 526–535.
  39. ^ a b Kellogg et al. 1939, p. 728.
  40. ^ Rigden 1987, p. 115.
  41. ^ Breit & Rabi 1934, pp. 230–231.
  42. ^ Rabi, Kellogg & Zacharias 1934a, pp. 157–163.
  43. ^ Rabi, Kellogg & Zacharias 1934b, pp. 163–165.
  44. ^ Rigden 1987, pp. 112–113.
  45. ^ Rabi et al. 1938, p. 318.
  46. ^ Rabi et al. 1992, pp. 131–133.
  47. ^ Goldstein 1992, p. 36.
  48. ^ "BRL's Scientific Advisory Committee, 1940". U.S. Army Research Laboratory. Archived from the original on December 1, 2016. Retrieved July 26, 2016.
  49. ^ Conant 2002, pp. 209–213.
  50. ^ Rigden 1987, pp. 131–134.
  51. ^ Rigden 1987, pp. 135–135.
  52. ^ Rigden 1987, p. 143.
  53. ^ Hewlett & Anderson 1962, pp. 230–232.
  54. ^ a b Rhodes 1986, p. 656.
  55. ^ Rigden 1987, pp. 155–156.
  56. ^ Isidor I. Rabi, "Radiofrequency spectroscopy" (Richtmyer Memorial Lecture, delivered at Columbia University in New York, on January 20, 1945).
  57. ^ "Meeting at New York, January 19 and 20, 1945" Physical Review, vol. 67, pp. 199–204 (1945).
  58. ^ Laurence, William (January 21, 1945). "'Cosmic pendulum' for clock planned" (PDF). The New York Times. p. 34. Retrieved June 15, 2012.
  59. ^ Rigden 1987, pp. 170–171.
  60. ^ a b Ramsey 1993, p. 319.
  61. ^ Rigden 1987, p. 15.
  62. ^ "Columbia Nobels". Columbia University. Archived from the original on October 29, 2012. Retrieved June 16, 2012.
  63. ^ "Martin L. Perl – Biographical". Nobel prize. Nobel Media. Retrieved March 19, 2016.
  64. ^ Rigden 1987, p. 68.
  65. ^ "Isidor Isaac "I. I." Rabi". Array of Contemporary American Physicists. Archived from the original on October 17, 2012. Retrieved June 16, 2012.
  66. ^ a b Berger, Marilyn (January 12, 1988). "Isidor Isaac Rabi, a Pioneer in Atomic Physics, Dies at 89". The New York Times. pp. A1, A24.
  67. ^ Rigden 1987, pp. 182–185.
  68. ^ Rigden 1987, pp. 235–237.
  69. ^ Hewlett & Anderson 1962, p. 648.
  70. ^ Hewlett & Duncan 1969, pp. 380–385.
  71. ^ Hewlett & Duncan 1969, pp. 403–408.
  72. ^ Rigden 1987, p. 246.
  73. ^ Hewlett & Duncan 1969, p. 665.
  74. ^ Rigden 1987, p. 227.
  75. ^ Wellerstein, Alex (January 16, 2015). "Oppenheimer, Unredacted: Part II". Restricted Data: the Nuclear Secrecy Blog. Retrieved February 1, 2015.
  76. ^ "White House Science Advisers". Array of Contemporary American Physicists. Archived from the original on July 22, 2013. Retrieved June 16, 2012.
  77. ^ Rigden 1987, pp. 248–251.
  78. ^ Friedman 1994, pp. 109–114.
  79. ^ MacKenzie 2001, p. 34.
  80. ^ "Isidor Isaac Rabi". The Franklin Institute. January 15, 2014. Retrieved March 19, 2016.
  81. ^ a b Ramsey 1993, p. 320.
  82. ISSN 0031-9228
    .
  83. American Academy of Achievement
    .
  84. ^ "Public Welfare Award". National Academy of Sciences. Retrieved February 18, 2011.
  85. ^ "APS Fellow Archive". American Physical Society. (search on year 1931 and institution Columbia University)
  86. ^ "I.I. Rabi Scholars Program | Undergraduate Research and Fellowships". urf.columbia.edu. Retrieved September 21, 2022.
  87. ^ "I.I. Rabi Scholars Program | Undergraduate Research and Fellowships". urf.columbia.edu. Retrieved July 24, 2023.
  88. ISSN 0362-4331
    . Retrieved January 23, 2016.
  89. ^ Rigden 1987, pp. xxi–xxii.
  90. ^ "Barry Dennen". BFI. Archived from the original on October 1, 2017. Retrieved August 31, 2023.
  91. ^ Collis, Clark (July 21, 2023). "Oppenheimer cast: Who plays who in Christopher Nolan's real-life drama". Entertainment Weekly. Retrieved July 24, 2023.
  92. ^ Moss, Molly; Knight, Lewis (July 22, 2023). "Oppenheimer cast: Full list of actors in Christopher Nolan film". Radio Times. Retrieved July 24, 2023.

References

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1956–1957 		Succeeded by
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