Combinatorial Level Densities from a Microscopic Relativistic Structure Model

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dc.creatorPezer, R.
dc.creatorVentura, A.
dc.creatorVretenar, D.
dc.date2002-05-27
dc.date2003-01-17
dc.date.accessioned2026-07-07T12:04:09Z
dc.date.available2026-07-07T12:04:09Z
dc.descriptionA new model for calculating nuclear level densities is investigated. The single-nucleon spectra are calculated in a relativistic mean-field model with energy-dependent effective mass, which yields a realistic density of single-particle states at the Fermi energy. These microscopic single-nucleon states are used in a fast combinatorial algorithm for calculating the non-collective excitations of nuclei. The method, when applied to magic and semi-magic nuclei, such as $^{60}$Ni, $^{114}$Sn and $^{208}$Pb, reproduces the cumulative number of experimental states at low excitation energy, as well as the s-wave neutron resonance spacing at the neutron binding energy. Experimental level densities above 10 MeV are reproduced by multiplying the non-collective level densities by a simple vibrational enhancement factor. Problems to be solved in the extension to open-shell nuclei are discussed
dc.description22 pages, 5 figures, revised version, to appear in Nucl. Phys. A
dc.identifierhttps://arxiv.org/abs/nucl-th/0205068
dc.identifierhttp://arxiv.org/abs/nucl-th/0205068
dc.identifierNucl.Phys.A717:21-43,2003
dc.identifierdoi:10.1016/S0375-9474(03)00614-6
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208038
dc.subjectNuclear Theory
dc.titleCombinatorial Level Densities from a Microscopic Relativistic Structure Model
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