dorsal/arxiv
View SchemaThe Origin of the Wigner Energy
| Authors | W. Satuła, D. J. Dean, J. Gary, S. Mizutori, W. Nazarewicz |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9702054 |
| URL | https://arxiv.org/abs/nucl-th/9702054 |
| DOI | 10.1016/S0370-2693(97)00711-9 |
| Journal | Phys.Lett. B407 (1997) 103-109 |
Abstract
Surfaces of experimental masses of even-even and odd-odd nuclei exhibit a sharp slope discontinuity at N=Z. This cusp (Wigner energy), reflecting an additional binding in nuclei with neutrons and protons occupying the same shell model orbitals, is usually attributed to neutron-proton pairing correlations. A method is developed to extract the Wigner term from experimental data. Both empirical arguments and shell-model calculations suggest that the Wigner term can be traced back to the isospin T=0 part of nuclear interaction. Our calculations reveal the rather complex mechanism responsible for the nuclear binding around the N=Z line. In particular, we find that the Wigner term cannot be solely explained in terms of correlations between the neutron-proton J=1, T=0 (deuteron-like) pairs.
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"abstract": "Surfaces of experimental masses of even-even and odd-odd nuclei exhibit a\nsharp slope discontinuity at N=Z. This cusp (Wigner energy), reflecting an\nadditional binding in nuclei with neutrons and protons occupying the same shell\nmodel orbitals, is usually attributed to neutron-proton pairing correlations. A\nmethod is developed to extract the Wigner term from experimental data. Both\nempirical arguments and shell-model calculations suggest that the Wigner term\ncan be traced back to the isospin T=0 part of nuclear interaction. Our\ncalculations reveal the rather complex mechanism responsible for the nuclear\nbinding around the N=Z line. In particular, we find that the Wigner term cannot\nbe solely explained in terms of correlations between the neutron-proton J=1,\nT=0 (deuteron-like) pairs.",
"arxiv_id": "nucl-th/9702054",
"authors": [
"W. Satu\u0142a",
"D. J. Dean",
"J. Gary",
"S. Mizutori",
"W. Nazarewicz"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(97)00711-9",
"journal_ref": "Phys.Lett. B407 (1997) 103-109",
"title": "The Origin of the Wigner Energy",
"url": "https://arxiv.org/abs/nucl-th/9702054"
},
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