  Depending on their type, supernova remnants may have ejecta material with
high abundance of heavy elements such as carbon or oxygen. In addition,
core-collapse supernovae explode in the wind material of their progenitor star
that may also have a high abundance of heavy elements. Hadronic collisions in
these enriched media spawn the production of gamma rays, neutrinos, and
secondary electrons with spectra that cannot be scaled from those calculated
for pp collisions, potentially leading to erroneous results. We used
Monte-Carlo event generators to calculate the differential production rate of
particles such as gamma rays, neutrinos, and secondary electrons for H, He, C,
and O nuclei as projectiles and as target material. The cross sections and the
multiplicity spectra are separately computed for each of the 16 combinations of
projectile and target. We describe characteristic effects of heavy nuclei in
the shape and normalization of the spectra of various particles produced.

High Energy Astrophysical Phenomena