Abstract :
We present that two scenarios of r-process in collapse-driven supernovae are viable to explain recently observed abundance patterns of the r-process elements. By numerical simulations of hydrodynamics and nuclear reaction network, we show that the successful r-process nucleosynthesis can take place in a prompt explosion and in neutrino-driven winds. These two scenarios may correspond to the progenitor-mass ranges, which give the difference between prompt explosions for lower-end massive stars and delayed explosions for other massive stars.
