An atomic nucleus can be considered a set of two‐nucleon systems. What are the forces between these pairs? How do protons and neutrons differ and how are they similar? Studies during the past three decades have given some answers and indicated which new kinds of experiments are likely to be most useful.
DETERMINATION OF THE fundamental law of force between two nucleons has occupied many physicists for the past three decades. Because the proton and electron have obvious similarities (elementarily, spin of 1/2, equal‐but opposite electric charge, Fermi statistics, antiparticles) the derivation of a nuclear “Coulomb’s law” would seem to be a just reward for working in this area. As we have rather slowly and laboriously learned, however, simplicity appears to be inversely proportional to some power of the coupling constant.
8. J. M. B. Kellogg, I. I. Rabi, N. F. Ramsey, Jr, J. R. Zacharias, Phys. Rev. 55, 318 (1939); https://doi.org/PHRVAO J. M. B. Kellogg, I. I. Rabi, N. F. Ramsey, Jr, J. R. Zacharias, 56, 728 (1939).https://doi.org/PHRVAO, Phys. Rev.
11. R. E. Seamon, K. A. Friedman, G. Breit, R. D. Haracz, J. M. Holt, A. Prakash, Phys. Rev. 165, 1579 (1968).https://doi.org/PHRVAO
12. L. Puzikov, R. Ryndin, J. Smorodinskij, Nuclear Physics 3, 436 (1957).
13. M. H. Mac Gregor, R. A. Arndt, A. A. Dubow, Phys. Rev. 135, B628 (1964).https://doi.org/PHRVAO
14. M. Hull, K. Lassila, H. Ruppel, F. McDonald, G. Breit, Phys. Rev. 122, 1606 (1961); https://doi.org/PHRVAO M. H. Mac Gregor, Phys. Rev. 123, 2154 (1961).https://doi.org/PHRVAO
19. R. A. Arndt, M. H. Mac Gregor, Phys. Rev. 141, 873 (1966); https://doi.org/PHRVAO R. A. Arndt, M. H. Mac Gregor, Methods in Computational Physics, vol. 6, Academic Press (1966).
20. P. Signell, N. R. Yoder, N. M. Miskovsky, Phys. Rev. 133, B1495 (1964).https://doi.org/PHRVAO
27. M. H. Mac Gregor, M. J. Moravcsik, Phys. Rev. Lett. 4, 524 (1960).https://doi.org/PRLTAO
28. Reported at the London “Few Nucleon Conference,” 1959.
29. H. P. Stapp, H. P. Noyes, M. J. Moravcsik, Proceedings of the 1960 High Energy Conferences at Rochester, p. 128; Proceedings of the 1962 High Energy Conferences at CERN, p. 131.
30. M. H. Mac Gregor, R. A. Arndt, R. M. Wright, Phys. Rev. 182, 1714 (1969).https://doi.org/PHRVAO
31. M. H. Mac Gregor, R. A. Arndt, R. M. Wright, Phys. Rev. 182, 1714 (1969).https://doi.org/PHRVAO
34. G. Breit, R. D. Haracz, High Energy Physics, (E. H. S. Burhop, ed.) vol. 1, p. 21, Academic Press Inc., New York, (1967).
35. L. N. Rothenberg, T. G. Masterson, Angular Distribution of 24‐MeV Neutrons Scattered by Protons, Univ. of Wisc. abstract for APS Washington meeting, April (1969).
36. S. C. Wright, D. Shawhan, L. Pondrom, S. Olsen, R. Handler, Phys. Rev. 175, 1704 (1968).https://doi.org/PHRVAO
37. M. H. Mac Gregor, R. M. Wright, R. A. Arndt, Phys. Rev. Lett. 19, 1209 (1967); https://doi.org/PRLTAO M. H. Mac Gregor, R. A. Arndt, R. M. Wright, Phys. Rev. 179, 1624 (1969).https://doi.org/PHRVAO
38. J. Bystricky, J. Čech, Z. Janout, Yu. M. Kazarinov, F. Lehar, L. B. Parfenov, Phys. Lett. 28B, 572 (1969).
39. Proceedings of the 1st International Colloquium on Nucleon–Nucleon and Pion–Nucleon Interactions, Dubna, lune (1968) (in Russian).
40. S. I. Bilenkaya, G. Cozzika, F. Lehar, Z. Janout, Phase‐Shift Analysis of p‐p and n‐p Elastic Scattering at 735 MeV, CERN preprint, June 1969.
41. N. Hoshizaki, S. Otsuki, W. Watari, M. Yonezawa, Progr. Theoret. Phys. (Kyoto) 27, 1199 (1962); https://doi.org/PTPKAV R. A. Bryan, C. R. Dismukes, W. Ramsay, Nucl. Phys. 45, 353 (1963).https://doi.org/NUPHA7
42. R. A. Arndt, R. A. Bryan, M. H. Mac Gregor, Phys. Lett. 21, 314 (1966).https://doi.org/PHLTAM
43. S. Stone III, Univ. of Calif. at Berkeley thesis, A Eorm‐Free, Semiphenomenological, Error‐Bounded, Potential Representation of Two‐Nucleon Experiments, July 1969.
44. A. E. S. Green, M. H. Mac Gregor, R. Wilson, Rev. Mod. Phys. 39, 495 (1967).https://doi.org/RMPHAT
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Malcolm H. Mac Gregor.
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