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A Simultaneous Measurement of the (γ,n) and (γ,p) Reactions in 4He

  • J. Asai
  • G. Feldman
  • R. E. J. Florizone
  • E. L. Hallin
  • D. M. Skopik
  • J. M. Vogt
  • R. C. Haight
  • S. M. Sterbenz
Part of the Few-Body Systems book series (FEWBODY, volume 7)

Abstract

A significant charge asymmetry in the nuclear force has been attributed to differences in the 4He(γ,n)3He and 4He(γ,p)3H cross sections below Eγ ∼ 35 MeV. To investigate this claim, we have performed a simultaneous measurement of these cross sections by measuring the recoiling 3He and 3H nuclei in the same detector system consisting of windowless ΔE proportional counters backed by silicon E detectors. We find, within our errors, that for 25 < Eγ < 35 MeV the ratio of the cross sections σ(γ,p)/σ(γ,n) is consistent with charge symmetry and with the predictions of shell-model calculations.

Keywords

Total Cross Section Nuclear Force Cross Section Ratio Absolute Cross Section Lead Glass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Wien 1994

Authors and Affiliations

  • J. Asai
    • 1
  • G. Feldman
    • 1
  • R. E. J. Florizone
    • 1
  • E. L. Hallin
    • 1
  • D. M. Skopik
    • 1
  • J. M. Vogt
    • 1
  • R. C. Haight
    • 2
  • S. M. Sterbenz
    • 2
  1. 1.Saskatchewan Accelerator LaboratoryUniversity of SaskatchewanSaskatoonCanada
  2. 2.Los Alamos National LaboratoryLos AlamosUSA

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