Gamow-Teller Transitions in Proton-Rich pf-shell Nuclei-relevance to supernovae explosions-
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
- IFIC, CSIC-University of Valencia, E-46071 Valencia (Spain)
- Department of Physics, University of Surrey, Guildford GU2 7XH, Surrey (United Kingdom)
Gamow-Teller (GT) transitions starting from unstable pf-shell nuclei play important roles in neutrino-induced reactions that happen under the extremely high temperature conditions in core-collapse (type II) supernovae. In the {beta} decay, it is difficult to obtain GT strengths B(GT) to higher excited states, but accurate half-lives can be measured. On the other hand, high-resolution ({sup 3}He,t) charge-exchange reactions at 0 deg. and at 420 MeV yield cross-sections, that are proportional to B(GT) values, for individual transitions up to high excitation. Assuming isospin symmetry, we performed a unique analysis to determine absolute B(GT) values for the T{sub z} {+-}1{yields}0 analogous GT transitions. Further {beta}-decay studies for unstable pf-shell nuclei to obtain accurate half-lives and feeding ratios are in progress.
- OSTI ID:
- 21143489
- Journal Information:
- AIP Conference Proceedings, Vol. 1016, Issue 1; Conference: 10. international symposium on origin of matter and evolution of galaxies: From the dawn of Universe to the formation of solar system, Sapporo (Japan), 4-7 Dec 2007; Other Information: DOI: 10.1063/1.2943595; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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