Robert Hofstadter

Template:Short description Template:Use mdy dates Template:Infobox scientist Robert Hofstadter (February 5, 1915 – November 17, 1990)<ref>Flint, Peter B., "Obituary: Dr. Robert Hofstadter Dies at 75; Won Nobel Prize in Physics in '61", The New York Times, November 19, 1990.</ref> was an American physicist. He was the joint winner of the 1961 Nobel Prize in Physics (together with Rudolf Mössbauer) "for his pioneering studies of electron scattering in atomic nuclei and for his consequent discoveries concerning the structure of nucleons".<ref name="W. McAllister p. 851">R. W. McAllister & Robert Hofstadter, "Elastic Scattering of 188 MeV Electrons from Proton and the Alpha Particle," Physical Review, V102, p. 851 (1956).</ref><ref name="Nobel">Template:Nobelprize including his Nobel Lecture, December 11, 1961 The Electron-Scattering Method and Its Application to the Structure of Nuclei and Nucleons</ref>

Biography

Hofstadter was born in New York City on February 5, 1915, to Polish Jewish immigrants Louis Hofstadter, a salesman, and Henrietta, née Koenigsberg. <ref>Template:Cite news</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> He attended elementary and high schools in New York City and entered City College of New York, graduating with a B.S. degree magna cum laude in 1935 at the age of 20, and was awarded the Kenyon Prize in Mathematics and Physics. He also received a Charles A. Coffin Foundation Fellowship from the General Electric Company, which enabled him to attend graduate school at Princeton University, where he earned his M.S. and Ph.D. degrees at the age of 23.<ref>Template:Cite book</ref> His doctoral dissertation was titled "Infra-red absorption by light and heavy formic and acetic acids."<ref>Template:Cite book</ref> He did his post-doctoral research at the University of Pennsylvania and was an assistant professor at Princeton before joining Stanford University. Hofstadter taught at Stanford from 1950 to 1985.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

In 1942 he married Nancy Givan (1920–2007), a native of Baltimore.<ref>Obituary to Nancy Givan from Stanford University, 2007.</ref> They had three children: Laura, Molly (who was disabled and not able to communicate),<ref>Douglas Hofstadter's autobiography</ref> and Pulitzer Prize-winner Douglas Hofstadter.<ref>National Academy of Sciences biography</ref>

Opus

Thallium-activated sodium iodide gamma ray detector

In 1948 Hofstadter filed a patent on this for the detection of ionizing radiation by this crystal.<ref>Template:US patent reference</ref><ref>"Robert Hofstadter" Biographical Memoirs National Academy of Sciences</ref> These thallium-activated sodium iodide detectors are widely used for gamma ray detection to this day.

Coining of the fermi (unit) and 1961 Nobel Lecture

Robert Hofstadter coined the term fermi, symbol fm,<ref>Template:Cite journal</ref> in honor of the Italian physicist Enrico Fermi (1901–1954), one of the founders of nuclear physics, in Hofstadter's 1956 paper published in the Reviews of Modern Physics journal, "Electron Scattering and Nuclear Structure".<ref>Hofstadter, Robert, department of physics, Stanford University, Stanford, California, "Electron Scattering and Nuclear Structure", Rev. Mod. Phys. 28, 214–254 (1956) © 1956 The American Physical Society</ref> The term is widely used by nuclear and particle physicists. When Hofstadter was awarded the 1961 Nobel Prize in Physics, it subsequently appeared in the text of his 1961 Nobel Lecture, "The electron-scattering method and its application to the structure of nuclei and nucleons" (December 11, 1961).<ref name="Nobel"/>

Compton Gamma Ray Observatory and EGRET Telescope

In his last few years, Hofstadter became interested in astrophysics and applied his knowledge of scintillators to the design of the EGRET gamma-ray telescope of the Compton Gamma Ray Observatory named for fellow Nobel Laureate in Physics (1927), Arthur Holly Compton. Stanford University's Department of Physics credits Hofstadter with being "one of the principal scientists who developed the Compton Observatory."<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Awards and honors

• 1958, elected to National Academy of Sciences.<ref name="Nobel"/>
• 1961 Nobel Prize in Physics, joint winner with Rudolf Mössbauer, "for his [Hofstadter's] pioneering studies of electron scattering in atomic nuclei and for his consequent discoveries concerning the structure of nucleons."<ref name="W. McAllister p. 851"/><ref>Robert Hofstadter "The Electron Scattering Method & its Application to the Structure of Nuclei and Nucleons", Nobel Lectures, Physics 1942–1962, pp. 560–581, Elsevier Pub. Co., Amsterdam-London-New York (Dec 1961).</ref>
• Stanford University has an annual lecture series named after Hofstadter, the Robert Hofstadter Memorial Lectures, which consists of two lectures each year, one oriented toward the general public and the other oriented toward scientists.
• 1970, elected to the American Academy of Arts and Sciences.<ref>{{#invoke:citation/CS1|citation

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• 1984 Golden Plate Award of the American Academy of Achievement.<ref>{{#invoke:citation/CS1|citation

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• 1986, elected to the American Philosophical Society.<ref>{{#invoke:citation/CS1|citation

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See also

• Fermi (unit)
• The Big Bang Theory popular TV sitcom supposedly named one of its main characters, Leonard Hofstadter, after Hofstadter.
• List of Jewish Nobel laureates

Further reading

• Hofstadter, Robert, "The electron-scattering method and its application to the structure of nuclei and nucleons", Nobel Lecture (December 11, 1961)
• Hofstadter, Robert, "Robert Hofstadter's speech at the Nobel Banquet", The Nobel Foundation, Stockholm, December 10, 1961.

Publication list

Technical reports:

• Hofstadter, R. "Detection of Neutrons with Scintillation Counters", Brookhaven National Laboratory, United States Department of Energy (through predecessor agency the Atomic Energy Commission), (November 1948).
• Hahn, B., Ravenhall, D. G. and R. Hofstadter. "High-energy Electron Scattering and the Charge Distributions of Selected Nuclei," Stanford University, United States Department of Energy (through predecessor agency the Atomic Energy Commission), Office of Naval Research and United States Air Force, (October 1955).
• Chambers, E.E. and R. Hofstadter. "The Structure of the Proton", Stanford University, United States Department of Energy (through predecessor agency the Energy Research and Development Administration), Office of Naval Research and United States Air Force (April 1956).
• Hofstadter, R. "Structure in the Proton and the Neutron", Stanford University, United States Department of Energy (through predecessor agency the Atomic Energy Commission), (June 1958).
• Collard, H., Hofstadter, R., Hughes, E. B., Johansson, A., Yearian, M. R., Day, R. B. and R. T. Wagner. "Elastic Electron Scattering from Tritium and Helium-3", Stanford University, United States Department of Energy (through predecessor agency the Atomic Energy Commission), Los Alamos Scientific Laboratory, Office of Naval Research, Air Force Research Laboratory, (October 1964).
• Hofstadter, R. "K-edge Subtraction Angiography with Synchrotron X-Rays: Final Technical Report, (February 1, 1984 to January 31, 1987)", Stanford University, United States Department of Energy, (September 1987).

External links

• Template:Nobelprize including his Nobel Lecture, December 11, 1961 The Electron-Scattering Method and Its Application to the Structure of Nuclei and Nucleons
• Robert Hofstadter: An Oral History, Stanford Historical Society Oral History Program, 1985.