dorsal/arxiv
View SchemaStatistical Properties of Nuclei by the Shell Model Monte Carlo Method
| Authors | Y. Alhassid |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0604069 |
| URL | https://arxiv.org/abs/nucl-th/0604069 |
| DOI | 10.1063/1.1945241 |
| Journal | International Conference on Nuclear Data for Science and Technology, R.C. Haight, M.B. Chadwick, T. Kawano, and P. Talou, eds., American Institute of Physics Conference Proceedings, vol. 769, p. 1283, New York (2005) |
Abstract
We use quantum Monte Carlo methods in the framework of the interacting nuclear shell model to calculate the statistical properties of nuclei at finite temperature and/or excitation energies. With this approach we can carry out realistic calculations in much larger configuration spaces than are possible by conventional methods. A major application of the methods has been the microscopic calculation of nuclear partition functions and level densities, taking into account both correlations and shell effects. Our results for nuclei in the mass region A ~ 50 - 70 are in remarkably good agreement with experimental level densities without any adjustable parameters and are an improvement over empirical formulas. We have recently extended the shell model theory of level statistics to higher temperatures, including continuum effects. We have also constructed simple statistical models to explain the dependence of the microscopically calculated level densities on good quantum numbers such as parity. Thermal signatures of pairing correlations are identified through odd-even effects in the heat capacity.
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"abstract": "We use quantum Monte Carlo methods in the framework of the interacting\nnuclear shell model to calculate the statistical properties of nuclei at finite\ntemperature and/or excitation energies. With this approach we can carry out\nrealistic calculations in much larger configuration spaces than are possible by\nconventional methods. A major application of the methods has been the\nmicroscopic calculation of nuclear partition functions and level densities,\ntaking into account both correlations and shell effects. Our results for nuclei\nin the mass region A ~ 50 - 70 are in remarkably good agreement with\nexperimental level densities without any adjustable parameters and are an\nimprovement over empirical formulas. We have recently extended the shell model\ntheory of level statistics to higher temperatures, including continuum effects.\nWe have also constructed simple statistical models to explain the dependence of\nthe microscopically calculated level densities on good quantum numbers such as\nparity. Thermal signatures of pairing correlations are identified through\nodd-even effects in the heat capacity.",
"arxiv_id": "nucl-th/0604069",
"authors": [
"Y. Alhassid"
],
"categories": [
"nucl-th",
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],
"doi": "10.1063/1.1945241",
"journal_ref": "International Conference on Nuclear Data for Science and\n Technology, R.C. Haight, M.B. Chadwick, T. Kawano, and P. Talou, eds.,\n American Institute of Physics Conference Proceedings, vol. 769, p. 1283, New\n York (2005)",
"title": "Statistical Properties of Nuclei by the Shell Model Monte Carlo Method",
"url": "https://arxiv.org/abs/nucl-th/0604069"
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