Physics – Nuclear Physics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992npu..work...24a&link_type=abstract
Presented at the Workshop on Nuclear Physics in the Universe, Oak Ridge, TN, 24-26 Sep. 1992
Physics
Nuclear Physics
Beta Particles, Charge Transfer, Electron Capture, Massive Stars, Radioactive Decay, Stellar Evolution, Supernovae, Calibrating, Collapse, Decay Rates, Electrons, Entropy
Scientific paper
The role of weak interactions, such as electron capture and beta decay on fp shell nuclei, during pre-supernova evolution of massive stars is examined. The utility of charge-exchange experiments for calibrating these rates is discussed. Recent (n,p) measurements indicate that the presently used rates need to be recalculated because the location of the Gamow-Teller resonances which dominate the rates in the presupernova environment could not be accurately determined. How these measurements allow us to calibrate our shell model calculations, and thus these rates, is explained. The general character of beta decay rates in this environment is then examined. It is shown that the creation and destruction rates for electrons appear to balance just after core silicon burning. A one zone model is used to examine how the beta decays will affect the evolution of the electron number and entropy. The consequences for collapse models are briefly examined.
No associations
LandOfFree
Charge-exchange reactions and weak interaction rates for Type 2 supernovae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Charge-exchange reactions and weak interaction rates for Type 2 supernovae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge-exchange reactions and weak interaction rates for Type 2 supernovae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1140019