FRLDM fission properties for the nucleosynthesis occurring in neutron star mergers

April APS, Denver, CO

Contributed presentation on 04/2019

August 2017 marked the first observation of gravitational waves and electromagnetic signals from the merging of two neutron stars sending ripples through the astrophysics, atomic physics, nuclear physics and gravitational wave communities. In some components of neutron star merger ejecta, fission is thought to re-cycle the material and impact the resultant abundances. I will discuss the fission properties that arise from the Finite-Range Liquid-Drop Model (FRLDM) covering the treatment of neutron-induced fission, beta-delayed fission and fission yields. The production of the heavy actinide Californium-254 in mergers will also be discussed.

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Related Publications

Year Authors Title (Click for more details) Journal (PDF)
2019 E. Holmbeck, A. Frebel, G. C. McLaughlin, M. Mumpower, et al. Actinide-rich and actinide-poor r-process enhanced metal-poor stars do not require separate r-process progenitors ApJ 881 1
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
2015 P. Möller, A. Sierk, T. Ichikawa, A. Iwamoto, et al. Fission barriers at the end of the chart of nuclides Phys. Rev C 91 024310

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Matthew Mumpower
Los Alamos National Lab
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