dorsal/arxiv
View SchemaTemperature Dependence of Pair Correlations in Nuclei in the Iron-Region
| Authors | K. Langanke, D. J. Dean, P. B. Radha, S. E. Koonin |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9601047 |
| URL | https://arxiv.org/abs/nucl-th/9601047 |
| DOI | 10.1016/0375-9474(96)00139-X |
| Journal | Nucl.Phys. A602 (1996) 244-262 |
Abstract
We use the shell model Monte Carlo approach to study thermal properties and pair correlations in $^{54,56,58}$Fe and in $^{56}$Cr. The calculations are performed with the modified Kuo-Brown interaction in the complete $1p0f$ model space. We find generally that the proton-proton and neutron-neutron $J=0$ pairing correlations, which dominate the ground state properties of even-even nuclei, vanish at temperatures around 1 MeV. This pairing phase transition is accompanied by a rapid increase in the moment of inertia and a partial unquenching of the M1 strength. We find that the M1 strength totally unquenches at higher temperatures, related to the vanishing of isoscalar proton-neutron correlations, which persist to higher temperatures than the pairing between like nucleons. The Gamow-Teller strength is also correlated to the isoscalar proton-neutron pairing and hence also unquenches at a temperature larger than that of the pairing phase transition.
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"abstract": "We use the shell model Monte Carlo approach to study thermal properties and\npair correlations in $^{54,56,58}$Fe and in $^{56}$Cr. The calculations are\nperformed with the modified Kuo-Brown interaction in the complete $1p0f$ model\nspace. We find generally that the proton-proton and neutron-neutron $J=0$\npairing correlations, which dominate the ground state properties of even-even\nnuclei, vanish at temperatures around 1 MeV. This pairing phase transition is\naccompanied by a rapid increase in the moment of inertia and a partial\nunquenching of the M1 strength. We find that the M1 strength totally unquenches\nat higher temperatures, related to the vanishing of isoscalar proton-neutron\ncorrelations, which persist to higher temperatures than the pairing between\nlike nucleons. The Gamow-Teller strength is also correlated to the isoscalar\nproton-neutron pairing and hence also unquenches at a temperature larger than\nthat of the pairing phase transition.",
"arxiv_id": "nucl-th/9601047",
"authors": [
"K. Langanke",
"D. J. Dean",
"P. B. Radha",
"S. E. Koonin"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0375-9474(96)00139-X",
"journal_ref": "Nucl.Phys. A602 (1996) 244-262",
"title": "Temperature Dependence of Pair Correlations in Nuclei in the Iron-Region",
"url": "https://arxiv.org/abs/nucl-th/9601047"
},
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