  To date, detailed core-collapse supernova simulations have not succeeded in
elucidating the explosion mechanism. But whatever the mechanism turns out to
be, there will be a neutrino-heated outflow between the hot, newly-born neutron
star and the outgoing supernova shock wave whose neutron richness, low density,
and high temperature could provide promising conditions for the synthesis of
heavy nuclei via rapid neutron capture (the r-process). General relativistic
effects improve the prospects for this outflow as an r-process site. Among
relativistic effects, the enhanced "gravitational potential" is more important
than the gravitational redshift or trajectory bending of neutrinos.
