Evidence for an imaginary spin-orbit term in the proton optical potential
Authors:
- 1 June 1978
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 4 (6) , L135-L140
Abstract
Evidence is given that there is a positive imaginary spin-orbit potential in the proton optical potential for 40Ca at around 30 MeV, dropping with energy and apparently becoming negative at high energies. This is consistent with probable phonon-coupling effects but inconsistent at lower energies with ab initio OM calculations. Similar behaviour is found for 16O but with generally much smaller values of the imaginary potential. The authors comment on the need for suitable data to enable them to establish the general properties of Wso, the imaginary spin-orbit strength. The determination of an imaginary spin-orbit potential is made possible since the l-dependent potential used permits unprecedented quality of fit for angular distributions for these nuclei.Keywords
This publication has 4 references indexed in Scilit:
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- Evidence for explicit angular momentum dependence of the proton optical model potentialPhysics Letters B, 1977
- Triple-scattering parameters in optical-model analysesNuclear Physics A, 1972
- Optical model for 30 MeV proton scatteringNuclear Physics A, 1967