Fission in the $r$-process

Frontiers (2019)

Contributed presentation on 05/2019

Fission has often been a neglected nuclear physics input for r-process simulations, despite its effect on the presence of long-lived actinides and influence in creation of the second (A~130) peak. I cover recent progress made at Los Alamos in improving fission properties relevant for the rapid neutron capture process (r-process). These new calculations include results for neutron-induced fission rates, beta-delayed fission and fission yields that arise from a detailed study of the Finite-Range Liquid-Drop Model. I end with a discussion of the impact of these new theory calculations on the abundances and observational properties of the r-process.

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Related Publications

Year Authors Title (Click for more details) Journal (PDF)
2019 N. Vassh, R. Vogt, R. Surman, J. Randrup, et al. Using excitation-energy dependent fission yields to identify key fissioning nuclei in r-process nucleosynthesis J. Phys. G 46 065202
2018 M. Mumpower, T. Kawano, T. M. Sprouse, N. Vassh, et al. $\beta$-delayed fission in $r$-process nucleosynthesis ApJ 869 1

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Matthew Mumpower
Los Alamos National Lab
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