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

Abstract

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.

Authors:
 [1];  [1];  [2];  [1];  [3];  [3];  [1]
  1. Univ. of Notre Dame, Notre Dame, IN (United States); Michigan State Univ., East Lansing, MI (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1233554
Alternate Identifier(s):
OSTI ID: 1215769
Report Number(s):
LA-UR-15-24098
Journal ID: ISSN 0556-2813; PRVCAN
Grant/Contract Number:
PHY0822648; PHY1419765; SC0013039; AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 3; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Mumpower, M. R., Surman, R., Fang, D. -L., Beard, M., Möller, P., Kawano, T., and Aprahamian, A.. Impact of individual nuclear masses on r-process abundances. United States: N. p., 2015. Web. doi:10.1103/PhysRevC.92.035807.
Mumpower, M. R., Surman, R., Fang, D. -L., Beard, M., Möller, P., Kawano, T., & Aprahamian, A.. Impact of individual nuclear masses on r-process abundances. United States. doi:10.1103/PhysRevC.92.035807.
Mumpower, M. R., Surman, R., Fang, D. -L., Beard, M., Möller, P., Kawano, T., and Aprahamian, A.. Tue . "Impact of individual nuclear masses on r-process abundances". United States. doi:10.1103/PhysRevC.92.035807. https://www.osti.gov/servlets/purl/1233554.
@article{osti_1233554,
title = {Impact of individual nuclear masses on r-process abundances},
author = {Mumpower, M. R. and Surman, R. and Fang, D. -L. and Beard, M. and Möller, P. and Kawano, T. and Aprahamian, A.},
abstractNote = {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.},
doi = {10.1103/PhysRevC.92.035807},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 92,
place = {United States},
year = {Tue Sep 15 00:00:00 EDT 2015},
month = {Tue Sep 15 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 12works
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