The (n,p) Reaction at 60 MeV on N>Z Targets

  • N. S. P. King
  • J. L. Ullmann


Historically, the work of Obu & Terasawa1 and Measday2 provided evidence that the (n,p) reaction showed some selectivity for population of collective states. However, until the recent experiments at UC Davis, no systematic studies with resolution ≲ 1 MeV were undertaken. A comparison of the (n,p) reaction on To = 0 targets with photonuclear experiments, inelastic electron scattering (particularly at θ = 180°), radiative pion capture and hadronic probes has revealed considerable sensitivity to known collective M1 and El states.3 These properties of the (n,p) reaction are identical to those of the (p,n) reaction on the same targets since only ≲T = 1 is allowed for both. The extension of the (n,p) reaction to To ≠ 0 targets leads to the same isovector (≲T = 1) selection rule. This is not the case for the (p,n) reaction which can populate ≲T = 0, ± 1 states favoring those with ≲T = -1 and ≲T = 0. This paper presents results of the (n,p) reaction at 60 MeV on 7Li, 9Be, 27A1, 58,60,62,64Ni, 90Zr, and 209Bi targets.


Giant Dipole Resonance Parent Analog Observe Cross Section Inelastic Electron Scattering DWBA Calculation 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • N. S. P. King
    • 1
  • J. L. Ullmann
    • 2
  1. 1.Los Alamos Scientific LaboratoryLos AlamosUSA
  2. 2.Crocker Nuclear Laboratory and Department of PhysicsUniversity of CaliforniaDavisUSA

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