On nucleosynthesis in supernovae beyond the iron peak
Abstract
An rbcprocess (rapid with back coupling) is proposed for synthesizing nuclei beyond the iron peak at the high temperatures, densities, and neutron excess found in superova explosions. The detailed balancing of (p, gamma) and (gamma, p) reactions will break down for highZ elements, causing all nuclei to fall into either of two groups. The main group of nuclei will have relative abundances conforming to the equations of nuclear statistical equilibrium, but the heavier nuclei will come into kinetic equilibrium through (gamma, p) reactions and beta() processes. Calculations for the group of nuclei having A values between 75 and 120 agree qualitatively with the general trend of the observed abundance curve.
 Publication:

Pisma v Astronomicheskii Zhurnal
 Pub Date:
 October 1982
 Bibcode:
 1982PAZh....8..600P
 Keywords:

 Abundance;
 Heavy Nuclei;
 Nuclear Capture;
 Nuclear Fusion;
 Supernovae;
 Neutron Flux Density;
 Nuclear Binding Energy;
 Nuclear Reactions;
 Thermodynamic Equilibrium;
 Weak Interactions (Field Theory);
 Astrophysics