Photodisintegration of {sup 80}Se: Implications for the s-process branching at {sup 79}Se
- Department of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501 (Japan)
- Institut d'Astronomie et d'Astrophysique, Universite Libre de Bruxelles, Campus de la Plaine, CP-226, 1050 Brussels (Belgium)
- Japan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki 319-1195 (Japan)
- National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568 (Japan)
- Atomic Energy Research Institute, Kinki University, Kowakae 3-4-1, Osaka 577-8502 (Japan)
- Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
Photoneutron cross sections were measured for {sup 80}Se immediately above the neutron separation energy with quasimonochromatic {gamma}-ray beams to experimentally constrain the E1 {gamma} strength function for {sup 80}Se. Two sets of the {gamma} strength function and the level density that equally meet the experimental constraint predict largely different neutron capture cross sections for {sup 79}Se. Based on the Maxwellian-averaged cross sections of the latest compilation complemented with the predicted cross sections for {sup 79}Se, we calculated {sigma}N values of the main s-process component using a phenomenological model and deduced empirical abundances of the weak s-process component. An attempt is made of considering the implications of the abundance ratios of {sup 80}Kr and {sup 82}Kr within the framework of phenomenological models for the weak s process.
- OSTI ID:
- 21199584
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 79, Issue 2; Other Information: DOI: 10.1103/PhysRevC.79.025801; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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