  Neutron star mergers (NSMs) are rapid neutron capture (r-process)
nucleosynthesis sites, which eject materials at high velocities, from 0.1c to
as high as 0.6c. Thus the r-process nuclei ejected from a NSM event are
sufficiently energetic to initiate spallation reactions with the interstellar
medium (ISM) particles. With a thick-target model for the propagation of
high-speed heavy nuclei in the ISM, we find that spallation reactions may shift
the r-process abundance patterns towards solar data, particularly around the
low-mass edges of the r-process peaks where neighboring nuclei have very
different abundances. The spallation effects depend both on the astrophysical
conditions of the r-process nuclei and nuclear physics inputs for the
nucleosynthesis calculations and the propagation process. This work extends
that of [Wang et al.(2019)] by focusing on the influence of nuclear physics
variations on spallation effects.
