He4(p,2p)H3 reaction at intermediate energies

W. T. H. van Oers, B. T. Murdoch, B. K. S. Koene, D. K. Hasell, R. Abegg, D. J. Margaziotis, M. B. Epstein, G. A. Moss, L. G. Greeniaus, J. M. Greben, J. M. Cameron, J. G. Rogers, and A. W. Stetz
Phys. Rev. C 25, 390 – Published 1 January 1982
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Abstract

The He4(p,2p)H3 reaction has been studied at 250, 350, and 500 MeV using coplanar symmetric and asymmetric geometries. The data are presented as energy-sharing spectra, coplanar symmetric angular distributions, and quasifree angular distributions. A comparison with distorted wave impulse approximation calculations indicates reasonable agreement for small recoil momenta (q150 MeV/c). For larger recoil momenta, the distorted-wave impulse approximation calculations increasingly underestimate the data. The discrepancies are substantially reduced by inclusion of a spin-orbit term in the optical potential used to generate the distorted waves. Improvements of the single particle wave function for the struck nucleon influence the calculations to a lesser degree. The remaining discrepancies at large recoil momenta may, in part, be ascribed to multiple scattering effects and exchange processes not included in the standard distorted-wave impulse approximation.

NUCLEAR REACTIONS He4(p,2p)H3; measured d3σ(dΩ3dΩ1dT3), 250, 350, 500 MeV, energy sharing spectra, coplanar symmetric angular distributions, quasifree angular distributions; comparison with DWIA calculations.

  • Received 5 June 1981

DOI:https://doi.org/10.1103/PhysRevC.25.390

©1982 American Physical Society

Authors & Affiliations

W. T. H. van Oers, B. T. Murdoch*, B. K. S. Koene, D. K. Hasell, and R. Abegg

  • Department of Physics, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada

D. J. Margaziotis and M. B. Epstein

  • Department of Physics, California State University, Los Angeles, California 90032

G. A. Moss, L. G. Greeniaus, J. M. Greben, and J. M. Cameron

  • Nuclear Research Center, University of Alberta, Edmonton, Alberta T6G 2J1, Canada

J. G. Rogers

  • TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

A. W. Stetz

  • Department of Physics, Oregon State University, Corvallis, Oregon 97331

  • *Present address: Schlumberger Well Services, Houston, Texas 77023.
  • Present address: NIKHEF-H, 1098 SJ Amsterdam, The Netherlands.
  • Present address: TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.

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Vol. 25, Iss. 1 — January 1982

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