dorsal/arxiv
View SchemaShell model method for Gamow-Teller Transitions in heavy, deformed nuclei
| Authors | Zao-Chun Gao, Yang Sun, Y. -S. Chen |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0609074 |
| URL | https://arxiv.org/abs/nucl-th/0609074 |
| DOI | 10.1103/PhysRevC.74.054303 |
| Journal | Phys.Rev.C74:054303,2006 |
Abstract
A method for calculation of Gamow-Teller transition rates is developed by using the concept of the Projected Shell Model (PSM). The shell model basis is constructed by superimposing angular-momentum-projected multi-quasiparticle configurations, and nuclear wave functions are obtained by digonalizing the two-body interactions in these projected states. Calculation of transition matrix elements in the PSM framework is discussed in detail, and the effects caused by the Gamow-Teller residual forces and by configuration-mixing are studied. With this method, it may become possible to perform a state-by-state calculation for beta-decay and electron-capture rates in heavy, deformed nuclei at finite temperatures. Our first example indicates that, while experimentally known Gamow-Teller transition rates from the ground state of the parent nucleus are reproduced, stronger transitions from some low-lying excited states are predicted to occur, which may considerably enhance the total decay rates once these nuclei are exposed to hot stellar environments.
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"abstract": "A method for calculation of Gamow-Teller transition rates is developed by\nusing the concept of the Projected Shell Model (PSM). The shell model basis is\nconstructed by superimposing angular-momentum-projected multi-quasiparticle\nconfigurations, and nuclear wave functions are obtained by digonalizing the\ntwo-body interactions in these projected states. Calculation of transition\nmatrix elements in the PSM framework is discussed in detail, and the effects\ncaused by the Gamow-Teller residual forces and by configuration-mixing are\nstudied. With this method, it may become possible to perform a state-by-state\ncalculation for beta-decay and electron-capture rates in heavy, deformed nuclei\nat finite temperatures. Our first example indicates that, while experimentally\nknown Gamow-Teller transition rates from the ground state of the parent nucleus\nare reproduced, stronger transitions from some low-lying excited states are\npredicted to occur, which may considerably enhance the total decay rates once\nthese nuclei are exposed to hot stellar environments.",
"arxiv_id": "nucl-th/0609074",
"authors": [
"Zao-Chun Gao",
"Yang Sun",
"Y. -S. Chen"
],
"categories": [
"nucl-th",
"astro-ph",
"nucl-ex"
],
"doi": "10.1103/PhysRevC.74.054303",
"journal_ref": "Phys.Rev.C74:054303,2006",
"title": "Shell model method for Gamow-Teller Transitions in heavy, deformed nuclei",
"url": "https://arxiv.org/abs/nucl-th/0609074"
},
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