Energy Dependence of the NN t-matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering

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dc.creatorElster, Ch.
dc.creatorWeppner, S. P.
dc.date1997-08-07
dc.date.accessioned2026-07-07T11:11:18Z
dc.date.available2026-07-07T11:11:18Z
dc.descriptionThe influence of the energy dependence of the free NN t-matrix on the optical potential of nucleon-nucleus elastic scattering is investigated within the context of a full-folding model based on the impulse approximation. The treatment of the pole structure of the NN t-matrix, which has to be taken into account when integrating to negative energies is described in detail. We calculate proton-nucleus elastic scattering observables for $^{16}$O, $^{40}$Ca, and $^{208}$Pb between 65 and 200 MeV laboratory energy and study the effect of the energy dependence of the NN t-matrix. We compare this result with experiment and with calculations where the center-of-mass energy of the NN t-matrix is fixed at half the projectile energy. It is found that around 200 MeV the fixed energy approximation is a very good representation of the full calculation, however deviations occur when going to lower energies (65 MeV).
dc.description11 pages (revtex), 6 postscript figures
dc.identifierhttps://arxiv.org/abs/nucl-th/9708010
dc.identifierhttp://arxiv.org/abs/nucl-th/9708010
dc.identifierPhys.Rev.C57:189,1998
dc.identifierdoi:10.1103/PhysRevC.57.189
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191051
dc.subjectNuclear Theory
dc.titleEnergy Dependence of the NN t-matrix in the Optical Potential for Elastic Nucleon-Nucleus Scattering
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