Stochastic Estimation of Nuclear Level Density in the Nuclear Shell Model: An Application to Parity-Dependent Level Density in ⁵⁸Ni

2015/11/30 by Noritaka Shimizu, Yutaka Utsuno, Yasunori Futamura +3 · 2 citations
Physics and Astronomy · #nucl-th

paper · pdf · doi:10.1016/j.physletb.2015.12.005

published as Phys. Lett. B 753, 13 (2016) · 13 pages, 4 figures

arxiv created 2015/12/18 · arxiv updated 2016/01/20

Abstract

We introduce a novel method to obtain level densities in large-scale shell-model calculations. Our method is a stochastic estimation of eigenvalue count based on a shifted Krylov-subspace method, which enables us to obtain level densities of huge Hamiltonian matrices. This framework leads to a successful description of both low-lying spectroscopy and the experimentally observed equilibration of J^π=2⁺ and 2^- states in ⁵⁸Ni in a unified manner.

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