Microscopic calculations of nuclear level densities with the Lanczos method

被引：18
作者：
Ormand, W. E. [1 ,2 ,3 ]
Brown, B. A. [2 ,3 ]
机构：
[1] Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA
[2] Michigan State Univ, Dept Phys, E Lansing, MI 48824 USA
[3] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA
来源：
PHYSICAL REVIEW C | 2020年 / 102卷 / 01期
基金：
美国国家科学基金会;
关键词：
SHELL-MODEL; ELEMENTS; PHYSICS; NUMBER; CODE;
D O I：
10.1103/PhysRevC.102.014315
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
A new method for computing the density of states in nuclei making use of an extrapolated form of the tridiagonal matrix obtained from the Lanczos method is presented. It will be shown that the global, average properties of the entire Lanczos matrix can be predicted from just four Lanczos iterations. The extrapolated Lanczos matrix (ELM) approach provides for an accurate computation of the density of states described within the configuration space, which, in some cases, is sufficient to accurately calculate the density of states at, or near, the neutron separation energy. Comparisons between theory and experiment are shown for Fe-57, Ge-74, and Ge-76. In addition, we show results for the J-dependence of moments and the level density for these three nuclei.
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页数：19
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