dorsal/arxiv
View SchemaParity-Projected Shell Model Monte Carlo Level Densities for fp-shell Nuclei
| Authors | C. Özen, K. Langanke, G. Martinez-Pinedo, D. J. Dean |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0703084 |
| URL | https://arxiv.org/abs/nucl-th/0703084 |
| DOI | 10.1103/PhysRevC.75.064307 |
| Journal | Phys.Rev.C75:064307,2007 |
Abstract
We calculate parity-dependent level densities for the even-even isotopes 58,62,66 Fe and 58 Ni and the odd-A nuclei 59 Ni and 65 Fe using the Shell Model Monte Carlo method. We perform these calculations in the complete fp-gds shell-model space using a pairing+quadrupole residual interaction. We find that, due to pairing of identical nucleons, the low-energy spectrum is dominated by positive parity states. Although these pairs break at around the same excitation energy in all nuclei, the energy dependence of the ratio of negative-to-positive parity level densities depends strongly on the particular nucleus of interest. We find equilibration of both parities at noticeably lower excitation energies for the odd-A nuclei 59 Ni and 65 Fe than for the neighboring even-even nuclei 58 Ni and 66 Fe.
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"abstract": "We calculate parity-dependent level densities for the even-even isotopes\n58,62,66 Fe and 58 Ni and the odd-A nuclei 59 Ni and 65 Fe using the Shell\nModel Monte Carlo method. We perform these calculations in the complete fp-gds\nshell-model space using a pairing+quadrupole residual interaction. We find\nthat, due to pairing of identical nucleons, the low-energy spectrum is\ndominated by positive parity states. Although these pairs break at around the\nsame excitation energy in all nuclei, the energy dependence of the ratio of\nnegative-to-positive parity level densities depends strongly on the particular\nnucleus of interest. We find equilibration of both parities at noticeably lower\nexcitation energies for the odd-A nuclei 59 Ni and 65 Fe than for the\nneighboring even-even nuclei 58 Ni and 66 Fe.",
"arxiv_id": "nucl-th/0703084",
"authors": [
"C. \u00d6zen",
"K. Langanke",
"G. Martinez-Pinedo",
"D. J. Dean"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.75.064307",
"journal_ref": "Phys.Rev.C75:064307,2007",
"title": "Parity-Projected Shell Model Monte Carlo Level Densities for fp-shell Nuclei",
"url": "https://arxiv.org/abs/nucl-th/0703084"
},
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