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High Energy Neutron-Proton Scattering and the Meson Theory of Nuclear Forces with Strong Coupling

J. Leite Lopes*,†

  • Palmer Physical Laboratory, Princeton University, Princeton, New Jersey

  • *Exchange Fellow of the U. S. Department of State.
  • †Now at the Faculdade Nacional de Filosofia, University of Brazil, Rio de Janeiro, Brazil.
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Phys. Rev. 70, 5 – Published 1 July, 1946

DOI: https://doi.org/10.1103/PhysRev.70.5

Abstract

In the first part of this paper the anisotropy of the elastic scattering of 14-Mev neutrons by protons is investigated in the meson field theory of nuclear forces with the scheme proposed by Møller and Rosenfeld in the strong coupling limit and in the symmetrical form. In the second Born's approximation, the virtual isobars decrease the ratio R of the differential cross sections in the backward and perpendicular directions (in the center of mass system), and R decreases with the isobar energy. R is still larger than 1; nevertheless, our results suggest the possibility that the combined effects of the virtual isobars and the tensor force might give a forward scattering in agreement with Amaldi's experiments. In the second part, the cross section of the inelastic scattering of 100-200-Mev neutrons by protons with production of isobars is evaluated in the Møller-Rosenfeld, pseudoscalar and Schwinger theories. The ratio of the total inelastic cross section and the elastic one is of the order of 0.03, for 100-Mev neutrons and for an isobar energy equal to 45 Mev. An experiment to detect the isobars would be important for a check of the fundamental ideas of the strong coupling formalism.

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References (18)

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  12. Omitted endnote

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  14. Omitted endnote

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  18. J. M. Jauch and N. Hu, Phys. Rev. 65, 289 (1944)

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Phys. Rev. 70, 5– Published 1 July, 1946
  • Received 28 January 1946

© 1946 American Physical Society

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