Physics – Nuclear Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dnp.jb013n&link_type=abstract
American Physical Society, Division of Nuclear Physics Meeting, October 4-7, 2000 Williamsburg, VA, abstract #JB.013
Physics
Nuclear Physics
Scientific paper
Weak interaction initiates the gravitational collapse of the core of a massive star. It also determines the mass of the core, strength of the shock wave and plays an important role in the neutronization of the core material and formation of heavy elements at the final stages of supernova explosion. Electron captures on nuclei in the iron mass region lower the electron-to-baryon ratio and shift the distribution of nuclei present in the core to more neutron-rich material. Weak interaction rates at high temp eratures and densities are calculated for the first time using a microscopic theory for sd-, fp- and fpg-shell nuclei. The calculation is done for more than 700 nuclei and includes many neutron-rich nuclei. Some astrophysical applications of the calculate d rates are also highlighted and discussed briefly.
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