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Photodisintegration of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Se</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>80</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>: Implications for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:math>-process branching at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Se</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>79</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

A. MakinagaDepartment of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, JapanH. UtsunomiyaDepartment of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, JapanS. GorielyInstitut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus de la Plaine, CP-226, 1050 Brussels, BelgiumT. KaihoriDepartment of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, JapanS. GokoJapan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki 319-1195, JapanH. AkimuneDepartment of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, JapanT. YamagataDepartment of Physics, Konan University, Okamoto 8-9-1, Higashinada, Kobe 658-8501, JapanH. ToyokawaNational Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, JapanTetsuro MatsumotoNational Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, JapanHideki HaranoNational Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, JapanHideo HaradaJapan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki 319-1195, JapanF. KitataniJapan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki 319-1195, JapanY. HaraJapan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki 319-1195, JapanSin-ya HoharaAtomic Energy Research Institute, Kinki University, Kowakae 3-4-1, Osaka 577-8502, JapanY.-W. LuiCyclotron Institute, Texas A&M University, College Station, Texas 77843, USA

2009lv

ABI

Annotatsiya

Photoneutron cross sections were measured for $^{80}\mathrm{Se}$ immediately above the neutron separation energy with quasimonochromatic $\ensuremath{\gamma}$-ray beams to experimentally constrain the $E1$ $\ensuremath{\gamma}$ strength function for $^{80}\mathrm{Se}$. Two sets of the $\ensuremath{\gamma}$ strength function and the level density that equally meet the experimental constraint predict largely different neutron capture cross sections for $^{79}\mathrm{Se}$. Based on the Maxwellian-averaged cross sections of the latest compilation complemented with the predicted cross sections for $^{79}\mathrm{Se}$, we calculated $\ensuremath{\sigma}N$ 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 $^{80}\mathrm{Kr}$ and $^{82}\mathrm{Kr}$ within the framework of phenomenological models for the weak $s$ process.

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DOI: 10.1103/physrevc.79.025801

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