dorsal/arxiv
View SchemaOn the Momentum Dependence of the Nucleon - Nucleus Optical Potential
| Authors | M. Kleinmann, R. Fritz, H. Müther, A. Ramos |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9402025 |
| URL | https://arxiv.org/abs/nucl-th/9402025 |
| DOI | 10.1016/0375-9474(94)90795-1 |
| Journal | Nucl.Phys. A579 (1994) 85-102 |
Abstract
The momentum dependence of the mean-field contribution to the real part of the optical model potential is investigated employing realistic nucleon-nucleon interactions. Within a non-relativistic approach a momentum dependence originates from the non-locality of the Fock exchange term. Deducing the real part of the optical model from a relativistic Dirac Brueckner Hartree Fock approximation for the self-energy of the nucleons yields an additional momentum dependence originating from the non-relativistic reduction of the self-energy. It is demonstrated that large Fock terms are required in the non-relativistic approach to simulate these relativistic features. A comparison is made between a local density approximation for the optical model and a direct evaluation in finite nuclei.
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"abstract": "The momentum dependence of the mean-field contribution to the real part of\nthe optical model potential is investigated employing realistic nucleon-nucleon\ninteractions. Within a non-relativistic approach a momentum dependence\noriginates from the non-locality of the Fock exchange term. Deducing the real\npart of the optical model from a relativistic Dirac Brueckner Hartree Fock\napproximation for the self-energy of the nucleons yields an additional momentum\ndependence originating from the non-relativistic reduction of the self-energy.\nIt is demonstrated that large Fock terms are required in the non-relativistic\napproach to simulate these relativistic features. A comparison is made between\na local density approximation for the optical model and a direct evaluation in\nfinite nuclei.",
"arxiv_id": "nucl-th/9402025",
"authors": [
"M. Kleinmann",
"R. Fritz",
"H. M\u00fcther",
"A. Ramos"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0375-9474(94)90795-1",
"journal_ref": "Nucl.Phys. A579 (1994) 85-102",
"title": "On the Momentum Dependence of the Nucleon - Nucleus Optical Potential",
"url": "https://arxiv.org/abs/nucl-th/9402025"
},
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