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.

引用

页数：8

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