## Fission properties for $r$-process nucleosynthesis

### r-process workshop, Tempe, AZ

Contributed presentation on 03/2019

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 will be covered along with its impact on observational signatures of kilonovae and consequences for merger morphology.

LA-UR-19-22694

### 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
2018 B. Côtè, C. L. Fryer, K. Belczynski, O. Korobkin, et al. The origin of r-process elements in the Milky Way ApJ 855 2
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

## Mail

Matthew Mumpower
Los Alamos National Lab
MS B283
TA-3 Bldg 123
Los Alamos, NM 87545