![]() ![]() Proceedings of the Photonuclear Conference at Chicage, November, 1956.Ījzenberg, F., and T. 4, 1 (1955).ĭiscusses the photodisintegration of light nuclei, particularly using the photographic plate technique. to give excellent tables of the characteristics of the giant resonance. In condensed matter physics K-theory has also found important. Report Bibliography of photonuclear reactions, 1955 and supplement No. theory (physics) In string theory, K-theory classification refers to a conjectured application of K-theory (in abstract algebra and algebraic topology) to superstrings, to classify the allowed RamondRamond field strengths as well as the charges of stable D-branes. 26, 402 (1954).Nuclear disintegration energies. Photodisintegration of nuclei beyond deuterium In addition they discuss the small effects of potential shape. These give the theory of the effective range as applied to the photonuclear effect. Outlines the method of inclusion of non central forces in a systematic way. This form the basis for all more accurate discussions. A 148, 146 (1935).įirst quantum theory of the deuteron with a calculation of the photoeffect. A 151, 479 (1935).The discovery of the process and its use for measurement of the neutron mass.īethe, H. This process is experimental and the keywords may be updated as the learning algorithm improves.Ĭhadwick, J., and M. These keywords were added by machine and not by the authors. At the same time Chadwick and Goldhaber measured the cross-section for photodisintegration of the deuteron at an energy of 2.62 Mev, and found a value in encouraging agreement with the theoretical one of Bethe and Peierls. Many years later the radioactive decay of the neutron was in fact observed. The measurements indicated that the neutron mass was greater than that of the proton, and in fact that it was unstable energetically against decay by negative electron emission to a proton. Apart from the intrinsic interest of the new phenomenon of the photodisintegration of a nucleus, they were thus enabled to estimate the mass of the neutron, combining the binding energy with the spectroscopic masses of hydrogen and of deuterium. By performing a similar irradiation with the γ-rays of 1.8 Mev energy of RaC, and observing almost no ionization due to photoprotons, they were able to deduce that the threshold of the reaction lay between 1.8 and 2.3 Mev. They detected the photoprotons by their ionization in the deuterium gas and measured their energy. The first photonuclear reaction was demonstrated by Chaswick and Goldhaber in 1934, who irradiated an ionization chamber filled with deuterium with the 2.62 Mev γ-rays emitted by ThC”. ![]()
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