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Indirect Measurement of Astrophysical 13C（α,n）16O S-Factors

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【作者】 郭冰； 李志宏； 李云居； 苏俊； 白希祥； 陈永寿； 樊启文； 金孙均； 李二涛； 李志常； 连钢； 刘鑫； 刘建成； 舒能川； 王宝祥； 王友宝； 颜胜权； 曾晟； 柳卫平； 庞丹阳； M. LUGARO； J. BUNTAIN；

【Author】 GUO Bing1,LI Zhihong1,LI Yunju1,SU Jun1,BAI Xixiang1,CHEN Yongshou1,FAN Qiwen1,JIN Sunjun1,LI Ertao 1,LI Zhichang1,LIAN Gang1,LIU Xin, LIU Jiancheng1,SHU Nengchuan 1,WANG Baoxiang1,WANG Youbao1,YAN Shengquan1,ZENG Sheng1,LIU Weiping1,PANG Danyang2,M. LUGARO 3,J. BUNTAIN 3 1 China Institute of Atomic Energy, Beijing 102413, China 2 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China 3 Center for Stellar and Planetary Astrophysics, Monash University, Clayton 3800, Victoria, Australia

【机构】 China Institute of Atomic Energy； School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University； Center for Stellar and Planetary Astrophysics,Monash University；

【摘要】 The 13C(α,n)16O reaction is believed to be the main neutron source reaction for the s-process in asymptotic giant branch (AGB) stars. The astrophysical S-factors of this reaction have been determined based on an evaluation of the α spectroscopic factor of the 1/2+ subthreshold state in 17O (Ex=6.356 MeV) by using the 13C(11B,7Li)17O α transfer reaction. Our result confirms that the 1/2+ subthreshold resonance is dominant for the 13C(α,n)16O reaction at low energies of astrophysical interest.

【Abstract】 The 13C(α,n)16O reaction is believed to be the main neutron source reaction for the s-process in asymptotic giant branch (AGB) stars. The astrophysical S-factors of this reaction have been determined based on an evaluation of the α spectroscopic factor of the 1/2+ subthreshold state in 17O (Ex=6.356 MeV) by using the 13C(11B,7Li)17O α transfer reaction. Our result confirms that the 1/2+ subthreshold resonance is dominant for the 13C(α,n)16O reaction at low energies of astrophysical interest.

【关键词】 transfer reaction； elastic scattering； s-process；
【Key words】 transfer reaction； elastic scattering； s-process；
【基金】 supported by National Basic Research Program of China (No.2007CB815003);National Natural Science Foundation of China(Nos.10705053,11021504,10720101076,10735100 and 10975193)
  • 【文献出处】 Plasma Science and Technology ,等离子体科学与技术(英文版) , 编辑部邮箱 ,2012年05期
  • 【分类号】P14
  • 【下载频次】11
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