  The simulation of heavy element nucleosynthesis requires input from
yet-to-be-measured nuclear properties. The uncertainty in the values of these
off-stability nuclear properties propagates to uncertainties in the predictions
of elemental and isotopic abundances. However, for any given astrophysical
explosion, there are many different trajectories, i.e. temperature and density
histories, experienced by outflowing material and thus different nuclear
properties can come into play. We consider combined nucleosynthesis results
from 460,000 trajectories from a neutron star-black hole accretion disk and the
find spread in elemental predictions due solely to unknown nuclear properties
to be a factor of a few. We analyze this relative spread in model predictions
due to nuclear variations and conclude that the uncertainties can be attributed
to a combination of properties in a given region of the abundance pattern. We
calculate a cross-correlation between mass changes and abundance changes to
show how variations among the properties of participating nuclei may be
explored. Our results provide further impetus for measurements of multiple
quantities on individual short-lived neutron-rich isotopes at modern
experimental facilities.
