Photodisintegration of 80Se and its implications for s-process branching

Journal Article · Mon Feb 26 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2713550· OSTI ID:21056775

Makinaga, A; Utsunomiya, H; Goko, S; Kaihori, T; Houhara, S ^[1]; Goriely, S ^[2]; Toyokawa, H; Harano, H; Matsumoto, T ^[3]; Harada, H; Kitatani, F; Hara, K Y ^[4]; Lui, Y -W ^[5]

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1. Department of Physics, Konan University, Kobe 658-8501 (Japan)
2. Institut d'Astronomie et d'Astrophysique, Universite Libre de Bruxelle, Campus de la Place, CP-226, 1050 Brussels (Belgium)
3. National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568 (Japan)
4. Japan Atomic Energy Agency, 2-4 Tokai, Ibaraki 319-1195 (Japan)
5. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)

Photodisintegration cross sections were measured for 80Se with laser Compton scattering {gamma} beams at E{gamma}=9.98-11.80 MeV near the neutron separation energy. The stellar neutron capture rate for 80Se was evaluated by using the photodisintegration data as constraints on the E1 {gamma} strength function for 80Se within the framework of the Hauser-Feshbach statistical model. It was found that the rate at 30 keV is 0.7-1.1 times that of Bao and Kaeppeler. s-process temperatures deduced from the empirical solar abundances of the s-only nuclei 79Se and 80Kr with this neutron capture rate are 17-25 keV in the neutron density rage of (0.8-1.9)x103/cm3.

• OSTI ID: 21056775
• Journal Information: AIP Conference Proceedings, Vol. 891, Issue 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713550; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CAPTURE
COMPTON EFFECT
CROSS SECTIONS
ELEMENT ABUNDANCE
HAUSER-FESHBACH THEORY
KEV RANGE
KRYPTON 80
MEV RANGE
NEUTRON DENSITY
NEUTRON REACTIONS
NEUTRON SEPARATION ENERGY
PHOTONUCLEAR REACTIONS
S PROCESS
SELENIUM 79
SELENIUM 80
STATISTICAL MODELS
STRENGTH FUNCTIONS