Indirect study of 13C(α,n)16O

被引：0

作者：

Hammache, F. ^{[1
]}

Pellegriti, M. G. ^{[1
]}

Roussel, P. ^{[1
]}

Audouin, L. ^{[1
]}

Beaumel, D. ^{[1
]}

Fortier, S. ^{[1
]}

Kiener, J. ^{[2
]}

Lefebvre-Schuhl, A. ^{[2
]}

Tatischeff, V. ^{[2
]}

Descouvemont, P. ^{[3
]}

Gaudefroy, L. ^{[4
]}

Stanoui, M. ^{[5
]}

机构：

[1] Univ Paris 11, CNRS, IN2P3, IPN Orsay, F-91406 Orsay, France

[2] Univ Paris XI, CSNSM, IN2P3, CNRS, F-91405 Orsay, France

[3] ULB, Phys Nucl Theor & Phys Math, B-1050 Brussels, Belgium

[4] CNRS, IN2P3, GANIL, Caen, France

[5] GSI Darmstadt, D-64220 Darmstadt, Germany

来源：

NINTH TORINO WORKSHOP ON EVOLUTION AND NUCLEOSYNTHESIS IN AGB STARS AND THE SECOND PERUGIA WORKSHOP ON NUCLEAR ASTROPHYSICS | 2008年

关键词：

AGB; neutron source; s-process; alpha-transfer; C-13(alpha; n)O-16;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The reaction C-13(alpha,n)O-16 is considered as the main neutron source for s-process in low-mass asymptotic giant branch stars. At low energies of astrophysical interest, the contribution of the subthreshold state 6.356 MeV of O-17 to the C-13(alpha,n)O-16 cross section should be taken into account. However, the results of previous studies of this contribution lead to different conclusions. Hence, we investigated the effect of this resonance on the astrophysical S-factor through a new precise measurement of the alpha spectroscopic factor, S-alpha, of the 6.356 MeV state using the transfer reaction C-13(Li-7,t)O-17 at two different incident energies. The, measured angular distributions and the obtained spectroscopic factors will be presented as well as their impact on C-13(alpha,n)O-16 cross section and reaction rate.

引用

页码：98 / +

页数：3

共 50 条

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