dorsal/arxiv
View SchemaSensitivity of nucleon-nucleus scattering to the off-shell behavior of on-shell equivalent NN potentials
| Authors | H. F. Arellano, F. A. Brieva, M. Sander, H. V. von Geramb |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9605005 |
| URL | https://arxiv.org/abs/nucl-th/9605005 |
| DOI | 10.1103/PhysRevC.54.2570 |
| Journal | Phys.Rev.C54:2570-2581,1996 |
Abstract
The sensitivity of nucleon-nucleus elastic scattering to the off-shell behavior of realistic nucleon-nucleon interactions is investigated when on-shell equivalent nucleon-nucleon potentials are used. The study is based on applications of the full-folding optical model potential for an explicit treatment of the off-shell behavior of the nucleon-nucleon effective interaction. Applications were made at beam energies between 40 and 500 MeV for proton scattering from 40Ca and 208Pb. We use the momentum-dependent Paris potential and its local on-shell equivalent as obtained with the Gelfand-Levitan and Marchenko inversion formalism for the two nucleon Schroedinger equation. Full-folding calculations for nucleon-nucleus scattering show small fluctuations in the corresponding observables. This implies that off-shell features of the NN interaction cannot be unambiguously identified with these processes. Inversion potentials were also constructed directly from NN phase-shift data (SM94) in the 0-1.3 GeV energy range. Their use in proton-nucleus scattering above 200 MeV provide a superior description of the observables relative to those obtained from current realistic NN potentials. Limitations and scope of our findings are presented and discussed.
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"abstract": "The sensitivity of nucleon-nucleus elastic scattering to the off-shell\nbehavior of realistic nucleon-nucleon interactions is investigated when\non-shell equivalent nucleon-nucleon potentials are used. The study is based on\napplications of the full-folding optical model potential for an explicit\ntreatment of the off-shell behavior of the nucleon-nucleon effective\ninteraction. Applications were made at beam energies between 40 and 500 MeV for\nproton scattering from 40Ca and 208Pb. We use the momentum-dependent Paris\npotential and its local on-shell equivalent as obtained with the\nGelfand-Levitan and Marchenko inversion formalism for the two nucleon\nSchroedinger equation. Full-folding calculations for nucleon-nucleus scattering\nshow small fluctuations in the corresponding observables. This implies that\noff-shell features of the NN interaction cannot be unambiguously identified\nwith these processes. Inversion potentials were also constructed directly from\nNN phase-shift data (SM94) in the 0-1.3 GeV energy range. Their use in\nproton-nucleus scattering above 200 MeV provide a superior description of the\nobservables relative to those obtained from current realistic NN potentials.\nLimitations and scope of our findings are presented and discussed.",
"arxiv_id": "nucl-th/9605005",
"authors": [
"H. F. Arellano",
"F. A. Brieva",
"M. Sander",
"H. V. von Geramb"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.54.2570",
"journal_ref": "Phys.Rev.C54:2570-2581,1996",
"title": "Sensitivity of nucleon-nucleus scattering to the off-shell behavior of on-shell equivalent NN potentials",
"url": "https://arxiv.org/abs/nucl-th/9605005"
},
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