Work

Microsopic nuclear level densities by the shell model Monte Carlo method

Year: 2016

Type: preprint

Abstract: The configuration-interaction shell model approach provides an attractive framework for the calculation of nuclear level densities in the presence of correlations, but the large dimensionality of the model space has hindered its application in mid-mass and heavy nuclei. The shell model Monte Carlo (SMMC) method permits calculations in model spaces that are many orders of magnitude larger than spaces that can be treated by conventional diagonalization methods. We discuss recent progress in the SMMC approach to level densities, and in particular the calculation of level densities in heavy nuclei. We calculate the distribution of the axial quadrupole operator in the laboratory frame at finite temperature and demonstrate that it is a model-independent signature of deformation in the rotational invariant framework of the shell model. We propose a method to use these distributions for calculating level densities as a function of intrinsic deformation.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.1601.00118

Authors: Alhassid, Y., Bertsch, G. F., Gilbreth, C. N., Nakada, H., Özen, C.

Institutions: Yale University, University of Washington, Chiba University, Kadir Has University

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Yale University, Office of Science, Faculty of Arts and Sciences, Japan Society for the Promotion of Science

Awards: G1286236842, G222768804, G3083819904, G3467422316, G4501827968, Elucidation of effects of shell structure and collective motions on nuclear level densities via microscopic theories, G498139845, G6652958823, G7146827954, G969889393

OpenAlex ID: W2952584466

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