Impact of individual nuclear masses on r-process abundances

Mumpower, M. R.; Surman, R.; Fang, D. -L.; Beard, M.; Möller, P.; Kawano, T.; Aprahamian, A.

doi:10.1103/PhysRevC.92.035807

Title: Impact of individual nuclear masses on $r$ -process abundances

Journal Article · Tue Sep 15 00:00:00 EDT 2015 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.92.035807· OSTI ID:1233554

Mumpower, M. R. ^[1]; Surman, R. ^[1]; Fang, D. -L. ^[2]; Beard, M. ^[1]; Möller, P. ^[3]; Kawano, T. ^[3]; Aprahamian, A. ^[1]

Univ. of Notre Dame, Notre Dame, IN (United States); Michigan State Univ., East Lansing, MI (United States)
Michigan State Univ., East Lansing, MI (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

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. As a result, 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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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: PHY0822648; PHY1419765; SC0013039; AC52-06NA25396

OSTI ID:: 1233554

Alternate ID(s):: OSTI ID: 1215769

Report Number(s):: LA-UR-15-24098; PRVCAN

Journal Information:: Physical Review C, Nuclear Physics, Vol. 92, Issue 3; ISSN 0556-2813

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 65 works

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