☆ 4.5 Article

Impact of individual nuclear masses on r-process abundances

PHYSICAL REVIEW C (2015)

期刊

PHYSICAL REVIEW C

卷 92, 期 3, 页码 -

出版社

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevC.92.035807

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-

类别

Physics, Nuclear

资金

National Science Foundation through the Joint Institute for Nuclear Astrophysics [PHY0822648, PHY1419765]
Department of Energy [DE-SC0013039]
Division Of Physics
Direct For Mathematical & Physical Scien [1430152] Funding Source: National Science Foundation

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Reagent

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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