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Neutron spectra at 0° from proton-proton collisions between 647 and 805 MeV

G. Glass, Mahavir Jain, M. L. Evans*, J. C. Hiebert, and L. C. Northcliffe

B. E. Bonner and J. E. Simmons

C. Bjork† and P. Riley

C. Cassapakis‡

  • Texas A & M University, College Station, Texas 77843

  • Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545

  • University of Texas, Austin, Texas 78712

  • University of New Mexico, Albuquerque, New Mexico 87106

  • *Present address: Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545.
  • †Present address: University of Wyoming, c/o LAMPF Visitor Center, Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545.
  • ‡Present address: Science Applications, Inc., LaJolla, California 92037.
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Phys. Rev. D 15, 36 – Published 1 January, 1977

DOI: https://doi.org/10.1103/PhysRevD.15.36

Abstract

Momentum spectra of neutrons at 0° from the process pp→npπ+ have been measured at 647, 771, and 805 MeV. Absolute cross sections d2σdΩdp and dσdΩ* are given for all three energies. A phenomenological calculation using only S- and P-wave πN phase shifts and an NN final-state interaction appears to account for the shapes and magnitudes of the spectra quite well. Comparison with the process np→pX indicates a non-negligible contribution from nonresonant amplitudes.

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Phys. Rev. D 15, 36– Published 1 January, 1977
  • Received 23 August 1976

© 1977 American Physical Society

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