Microscopic calculations of nuclear level densities with the Lanczos method

被引：16
|
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.
引用
收藏
页数：19
相关论文
共 50 条
  • [31] Stochastic extension of the Lanczos method for nuclear shell-model calculations with variational Monte Carlo method
    Shimizu, Noritaka
    Mizusaki, Takahiro
    Kaneko, Kazunari
    PHYSICS LETTERS B, 2013, 723 (1-3) : 251 - 254
  • [32] Calculation of microscopic nuclear level densities based on covariant density functional theory
    Kun-Peng Geng
    Peng-Xiang Du
    Jian Li
    Dong-Liang Fang
    Nuclear Science and Techniques, 2023, 34
  • [33] Drip-line to drip-line microscopic nuclear level densities
    Hilaire, S.
    Goriely, S.
    FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS: FINUSTAR 2, 2008, 1012 : 356 - +
  • [34] Calculation of microscopic nuclear level densities based on covariant density functional theory
    Geng, Kun-Peng
    Du, Peng-Xiang
    Li, Jian
    Fang, Dong-Liang
    NUCLEAR SCIENCE AND TECHNIQUES, 2023, 34 (10)
  • [35] Fission dynamics with microscopic level densities
    Randrup, Jorgen
    Ward, Daniel
    Carlsson, Gillis
    Dossing, Thomas
    Moller, Peter
    Aberg, Sven
    SCIENTIFIC WORKSHOP ON NUCLEAR FISSION DYNAMICS AND THE EMISSION OF PROMPT NEUTRONS AND GAMMA RAYS (THEORY-4), 2018, 169
  • [36] FISSION DYNAMICS WITH MICROSCOPIC LEVEL DENSITIES
    Ward, D.
    Carlsson, B. G.
    Dossing, Th.
    Moller, P.
    Randrup, J.
    Aberg, S.
    XXIII NUCLEAR PHYSICS WORKSHOP MARIE AND PIERRE CURIE: ESSENTIAL PROBLEMS IN NUCLEAR PHYSICS, 2016, 2017, 10 (01): : 201 - 209
  • [37] Fission Dynamics with Microscopic Level Densities
    Ward, D.
    Carlsson, B. G.
    Dossing, Th.
    Moeller, P.
    Randrup, J.
    Aberg, S.
    FISSION AND PROPERTIES OF NEUTRON-RICH NUCLEI, 2018, : 341 - 350
  • [38] NUCLEAR-LEVEL DENSITIES AND THERMAL-PROPERTIES FOR FIXED SPIN IN MICROSCOPIC TREATMENTS
    CANOSA, N
    ROSSIGNOLI, R
    RING, P
    PHYSICAL REVIEW C, 1994, 50 (06): : 2850 - 2859
  • [39] Microscopic Study of Nuclear Level Densities and Thermal Properties in 56,57Fe
    Z.Kargar
    N.Ghahramani
    A.Moradi
    Communications in Theoretical Physics, 2007, 48 (09) : 531 - 533
  • [40] Direct microscopic calculation of nuclear level densities in the shell model Monte Carlo approach
    Alhassid, Y.
    Bonett-Matiz, M.
    Liu, S.
    Nakada, H.
    PHYSICAL REVIEW C, 2015, 92 (02):
12345