Elsevier

Nuclear Physics A

Volume 189, Issue 1, 10 July 1972, Pages 20-34
Nuclear Physics A

A local versus non-local t-matrix in the 14N(p, 2p)13C reaction at 46 MeV

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Abstract

The angular distributions for the 14N(p, 2p)13C reactions at 46 MeV incident proton energy are calculated in the distorted wave t-matrix approximation (DWTA) where approximate optical-model waves are used. A comparison is made between the calculation using a local t-matrix to that of a non-local t-matrix. The (p, 2p) angular distribution is smaller in magnitude where a non-local t-matrix is employed compared to the calculation using a local t-matrix which implies that there is an overall enhancement of absorption associated with the non-local t-matrix. This also implies that differences between the local and non-local off-energy-shell effects can be significant. Parameter studies were undertaken for the distorted waves and bound state wave function and the effects on the angular distributions were similar in the local and non-local cases. The distortion effect due to the final-state focus phase dramatically changes the shape of the angular distribution. The calculations are considered to be a test of the off-energy-shell effects due to non-local interaction. This calculation is also a test of the approximate distorted waves at 46 MeV and the comparison to the 14N(p, 2p)13C data indicates that the distortion is reasonably well described.

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Work supported in part by a Research Corporation Grant and a Faculty Research Fellowship from the University of Idaho graduate school.

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