Elsevier

Nuclear Physics A

Volume 218, Issue 2, 14 January 1974, Pages 221-238
Nuclear Physics A

Background-resonance interference effects in knockout reactions

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Abstract

Deep-hole excitations formed in knockout reactions decay rapidly by the ejection of additional nucleons. Coherent background processes that lead to the same final states are discussed. Distorted wave calculations are carried out for the 460 MeV12C(p, 2p) reaction in the energy region of the s12 knockout peak. Interesting threshold effects occur as a result of the proximity of the s12 peak to the threshold for (p32)2 ejection from 12C. The background processes provide small modifications to the resonance peak; this suggests that high-energy knockout reactions can serve as a useful probe of inner shells in nuclei. Complications associated with the exclusion principle in intermediate states are responsible for the principal uncertainties of the analysis.

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††

Work supported in part by the National Science Foundation.

Present address: Bartol Research Foundation, Swarthmore, Pa. 19081.

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