dorsal/arxiv
View SchemaIsovector Pairing in Odd-A Proton-Rich Nuclei
| Authors | Jonathan Engel, Karlheinz Langanke, Petr Vogel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9803018 |
| URL | https://arxiv.org/abs/nucl-th/9803018 |
| DOI | 10.1016/S0370-2693(98)00477-8 |
| Journal | Phys.Lett. B429 (1998) 215-221 |
Abstract
A simple model based on the group SO(5) suggests that both the like-particle and neutron-proton components of isovector pairing correlations in odd-A nuclei are Pauli blocked. The same effect emerges from Monte Carlo Shell-model calculations of proton-rich nuclei in the full fp shell. There are small differences between the two models in their representation of the effects of an odd nucleon on the competition between like-particle and neutron-proton pairing, but they can be understood and reduced by using a two-level version of the SO(5) model. On the other hand, in odd-odd nuclei with N not equal to Z SO(5) disagrees more severely with the shell model because it incorrectly predicts ground-state isospins. The shell model calculations for any fp-shell nuclei can be extended to finite temperature, where they show a decrease in blocking.
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"abstract": "A simple model based on the group SO(5) suggests that both the like-particle\nand neutron-proton components of isovector pairing correlations in odd-A nuclei\nare Pauli blocked. The same effect emerges from Monte Carlo Shell-model\ncalculations of proton-rich nuclei in the full fp shell. There are small\ndifferences between the two models in their representation of the effects of an\nodd nucleon on the competition between like-particle and neutron-proton\npairing, but they can be understood and reduced by using a two-level version of\nthe SO(5) model. On the other hand, in odd-odd nuclei with N not equal to Z\nSO(5) disagrees more severely with the shell model because it incorrectly\npredicts ground-state isospins. The shell model calculations for any fp-shell\nnuclei can be extended to finite temperature, where they show a decrease in\nblocking.",
"arxiv_id": "nucl-th/9803018",
"authors": [
"Jonathan Engel",
"Karlheinz Langanke",
"Petr Vogel"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(98)00477-8",
"journal_ref": "Phys.Lett. B429 (1998) 215-221",
"title": "Isovector Pairing in Odd-A Proton-Rich Nuclei",
"url": "https://arxiv.org/abs/nucl-th/9803018"
},
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