Session B4 - Stellar Nucleosynthesis.
MIXED session, Thursday afternoon, October 29
Room 1, Sweeney Convention Center
Fundamental problems in nuclear astrophysics are being addressed by making new evaluations of nuclear reactions. At LANL, multichannel R-matrix analyses of reactions in the ^16O and ^17O systems have been used to obtain extrapolated S-factors for the extremely important ^12C(\alpha,\gamma) and ^13C(\alpha,n) reactions. At ANL, data for astrophysically important (p,\gamma) and (p,\alpha) reactions involving stable-isotope targets with masses 30-50 - such as ^32S(p,\gamma)^33Cl and ^31P(p,\alpha)^28Si - are being compiled and evaluated, and corresponding reaction rates with uncertainties are being generated. At BNL, cross sections for charged particle-, neutron-, and photon-induced reactions of astrophysical importance are being compiled and put into the online CSISRS database at the National Nuclear Data Center. At ORNL, the stellar rates of the important explosive nucleosynthesis reactions ^14O(\alpha,p)^17F and ^17F(p,\gamma)^18Ne have been determined from recent indirect measurements, and the Caughlan and Fowler reaction rate collection has been disseminated on the WWW.