Impact of individual nuclear masses on r-process abundances

被引：75
|
作者：
Mumpower, M. R. [1 ,2 ]
Surman, R. [1 ,2 ]
Fang, D. -L. [3 ]
Beard, M. [1 ,2 ]
Moeller, P. [4 ]
Kawano, T. [4 ]
Aprahamian, A. [1 ,2 ]
机构：
[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
[2] Univ Notre Dame, Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA
[3] Michigan State Univ, Dept Phys, E Lansing, MI 48824 USA
[4] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
来源：
PHYSICAL REVIEW C | 2015年 / 92卷 / 03期
基金：
美国国家科学基金会;
关键词：
PROCESS NUCLEOSYNTHESIS; NEUTRON-CAPTURE; ELEMENTS; MODEL; SUPERNOVAE; EVOLUTION; EJECTA; STARS; WIND; PEAK;
D O I：
10.1103/PhysRevC.92.035807
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：
We have performed for the first time a comprehensive study of the sensitivity of r-process nucleosynthesis to individual nuclear masses across the chart of nuclides. Using the latest version (2012) of the Finite-Range Droplet Model, we consider mass variations of +/- 0.5 MeV and propagate each mass change to all affected quantities, including Q values, reaction rates, and branching ratios. We find such mass variations can result in up to an order of magnitude local change in the final abundance pattern produced in an r-process simulation. We identify key nuclei whose masses have a substantial impact on abundance predictions for hot, cold, and neutron star merger r-process scenarios and could be measured at future radioactive beam facilities.
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收藏
页数：8
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