dorsal/arxiv
View SchemaParticle-Number Reprojection in the Shell Model Monte Carlo Method: Application to Nuclear Level Densities
| Authors | Y. Alhassid, S. Liu, H. Nakada |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9910042 |
| URL | https://arxiv.org/abs/nucl-th/9910042 |
| DOI | 10.1103/PhysRevLett.83.4265 |
| Journal | Phys.Rev.Lett. 83 (1999) 4265 |
Abstract
We introduce a particle-number reprojection method in the shell model Monte Carlo that enables the calculation of observables for a series of nuclei using a Monte Carlo sampling for a single nucleus. The method is used to calculate nuclear level densities in the complete $(pf+g_{9/2})$-shell using a good-sign Hamiltonian. Level densities of odd-A and odd-odd nuclei are reliably extracted despite an additional sign problem. Both the mass and the $T_z$ dependence of the experimental level densities are well described without any adjustable parameters. The single-particle level density parameter is found to vary smoothly with mass. The odd-even staggering observed in the calculated backshift parameter follows the experimental data more closely than do empirical formulae.
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"abstract": "We introduce a particle-number reprojection method in the shell model Monte\nCarlo that enables the calculation of observables for a series of nuclei using\na Monte Carlo sampling for a single nucleus. The method is used to calculate\nnuclear level densities in the complete $(pf+g_{9/2})$-shell using a good-sign\nHamiltonian. Level densities of odd-A and odd-odd nuclei are reliably extracted\ndespite an additional sign problem. Both the mass and the $T_z$ dependence of\nthe experimental level densities are well described without any adjustable\nparameters. The single-particle level density parameter is found to vary\nsmoothly with mass. The odd-even staggering observed in the calculated\nbackshift parameter follows the experimental data more closely than do\nempirical formulae.",
"arxiv_id": "nucl-th/9910042",
"authors": [
"Y. Alhassid",
"S. Liu",
"H. Nakada"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevLett.83.4265",
"journal_ref": "Phys.Rev.Lett. 83 (1999) 4265",
"title": "Particle-Number Reprojection in the Shell Model Monte Carlo Method: Application to Nuclear Level Densities",
"url": "https://arxiv.org/abs/nucl-th/9910042"
},
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