![]() In the course of this collision, the incoming photon transfers some part of its energy and momentum to the target electron and leaves the scene as a scattered photon. An incoming photon in this stream collides with a valence electron in the graphite target. Compton assumed that the incident X-ray radiation is a stream of photons. The experimental data in this figure are plotted in arbitrary units so that the height of the profile reflects the intensity of the scattered beam above background noise.Īs given by Compton, the explanation of the Compton shift is that in the target material, graphite, valence electrons are loosely bound in the atoms and behave like free electrons. ![]() Willard Libby to Secretary of Commerce Lewis Strauss, personal letter, November 25 (from the files of the AEC).Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnson, editor (Alfred A. 430.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. Lemaitre, The Primeval Atom, Betty Korff and Serge Korff, translators, 1950.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. Brown and Lillian Hoddeson, “The Birth of Elementary Particle Physics,” Physics Today, April 1982. Brown and Lillian Hoddeson, “The Birth of Elementary Particle Physics” Physics Today, April 1982 see also Robert Marshak, “The Multiplicity of Particles”, as reprinted in Scientific American Reader (Simon & Schuster, New York, 1953). Schweber, “Shelter Island, Pocono, and Oldstone: The Emergence of American Quantum Electrodynamics after World War H,” Osiris, Vol. Robert Oppenheimer, to his brother Frank, personal letter, June 4, 1939. 43.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. 211–216.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. De Maria, “Cosmic Ray Romancing: The Discovery of the Latitude Effect and the Compton-Millikan Controversy,” in Historical Studies in the Physical and Biological Sciences (University of California Press, Berkeley, 1986), pp. ![]() Katherine Russell Sopka, Quantum Physics in America (American Institute of Physics, New York, 1988), Vol. Nathan Reingold, “Physics and Engineering in the United States, 1945–1965, A Study of Pride and Prejudice,” in The Michelson Era in American Science: 1870–1930 (American Institute of Physics, New York, 1988), p. John Slater to Linus Pauling, personal letter, December 16, 1953. Condon, “60 Years of Quantum Mechanics,” Physics Today, October 1962. 5.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. Compton, “A Quantum Theory of the Scattering of X-rays by Light Elements,” The Physical Review, May 1923, Vol. Bragg, letter to Nature, May 27,1915 see also A. 91.Īrthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjorie Johnston, editor (Alfred A. Lewis of the University of California first used the word “photon” to describe a quantum of energy emitted by one atom and absorbed by another see Arthur Holly Compton, The Cosmos of Arthur Holly Compton, Marjone Johnston, editor (Alfred A. ![]() This process is experimental and the keywords may be updated as the learning algorithm improves.Īccording to Comp ton in a letter of August 11, 1949, to Samuel Glasstone, the author of Sourcebook on Atomic Energy, G. These keywords were added by machine and not by the authors. This would be like visible light of one color hitting a mirror, and then being reflected as a different color.) Keywords According to his findings, when X rays impinged on the surface of a crystal, the crystal reflected them at a lower frequency than they had when they first hit the crystal. Thomson’s classical theory of the scattering of X-rays, though supported by the early experiments of Barkla and others, has been found incapable of explaining many of the more recent experiments.” (The experiments were those Compton himself had carried out. In his classic paper, “A Quantum Theory of the Scattering of X-rays by Light Elements,” 1 Compton points out that “. At about the time Linus Pauling was just beginning to think about the nature of the chemical bond, another scientist, Arthur Compton, was clearing away more mysteries surrounding the new science of quantum mechanics.
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