Systematics of the (π+,p) reaction with light nuclei

W. R. Wharton and B. D. Keister
Phys. Rev. C 23, 1141 – Published 1 March 1981
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Abstract

Recent (π+,p) angular distribution measurements for ground state transitions in several light nuclei exhibit energy independence in both shape and magnitude over a wide energy range. They also exhibit a simple exponential decrease with momentum transfer, exp(qλ). The parameter λ has a smooth variation with target mass A. The magnitudes of the cross sections are proportional to the spectroscopic strength of the transition except for B11(π+,p), which is a factor of 3 high and O16(π+,p), which is a factor of 10 low. A single neutron pickup distorted-wave calculation appears to be incapable of reproducing the experimental data and will require a major modification. A two nucleon model is briefly examined and shows potential for success.

NUCLEAR REACTIONS (π,p) on Li6,7, Be10, B11, C12,13,14, O16; 5<Tπ<200 MeV compilation of data, theoretical study of mechanism.

  • Received 28 April 1980

DOI:https://doi.org/10.1103/PhysRevC.23.1141

©1981 American Physical Society

Authors & Affiliations

W. R. Wharton and B. D. Keister

  • Department of Physics, Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213

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Vol. 23, Iss. 3 — March 1981

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