Influence of nuclear physics inputs and astrophysical conditions on r-process
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  • 英文篇名:Influence of nuclear physics inputs and astrophysical conditions on r-process
  • 作者:Zhu ; Li ; ZhongMing ; Niu ; BaoHua ; Sun
  • 英文作者:Zhu Li;ZhongMing Niu;BaoHua Sun;School of Physics and Nuclear Energy Engineering, Beihang University;School of Physics and Materials Science, Anhui University;Institute of Physical Science and Information Technology, Anhui University;Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beihang University;
  • 英文关键词:r-process;;nuclear masses;;β-decay rates;;neutron-capture rates
  • 中文刊名:JGXG
  • 英文刊名:中国科学:物理学 力学 天文学(英文版)
  • 机构:School of Physics and Nuclear Energy Engineering, Beihang University;School of Physics and Materials Science, Anhui University;Institute of Physical Science and Information Technology, Anhui University;Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beihang University;
  • 出版日期:2019-02-27 09:24
  • 出版单位:Science China(Physics,Mechanics & Astronomy)
  • 年:2019
  • 期:v.62
  • 基金:supported by the National Natural Science Foundation of China(Grant Nos.11875070,U1832211,and 11711540016);; the National Key R&D program of China(Grant No.2016YFA0400504);; the Natural Science Foundation of Anhui Province(Grant No.1708085QA10);; the Open fund for Discipline Construction,Institute of Physical Science and Information Technology,Anhui University
  • 语种:英文;
  • 页:JGXG201908006
  • 页数:8
  • CN:08
  • ISSN:11-5849/N
  • 分类号:79-86
摘要
The rapid neutron-capture process(r-process) is one of the main mechanisms to explain the origin of heavy elements in the universe. Although the past decades have seen great progress in understanding this process, the related nuclear physics inputs to r-process models include significant uncertainty. In this study, ten nuclear mass models, including macroscopic, macroscopicmicroscopic, and microscopic models, are used to calculate the β-decay rates and neutron-capture rates of the neutron-rich isotopes for the r-process simulations occurring in three classes of astrophysical conditions. The final r-process abundances include uncertainties introduced by the nuclear mass model mainly through the variation of neutron-capture rates, whereas the uncertainties of β-decay rates make a relatively small contribution. The uncertainties in different astrophysical scenarios are also investigated,and are found to be connected to the diverse groups of nuclei produced during nucleosynthesis.
        The rapid neutron-capture process(r-process) is one of the main mechanisms to explain the origin of heavy elements in the universe. Although the past decades have seen great progress in understanding this process, the related nuclear physics inputs to r-process models include significant uncertainty. In this study, ten nuclear mass models, including macroscopic, macroscopicmicroscopic, and microscopic models, are used to calculate the β-decay rates and neutron-capture rates of the neutron-rich isotopes for the r-process simulations occurring in three classes of astrophysical conditions. The final r-process abundances include uncertainties introduced by the nuclear mass model mainly through the variation of neutron-capture rates, whereas the uncertainties of β-decay rates make a relatively small contribution. The uncertainties in different astrophysical scenarios are also investigated,and are found to be connected to the diverse groups of nuclei produced during nucleosynthesis.
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