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

doi:10.1088/1009-0630/14/5/01

Plasma Science and Technology

RADIOACTIVE NUCLEAR BEAM PHYSICS AND NUCLEAR ASTROPHYSICS

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

Guo Bing (郭冰)¹, Li Zhihong (李志宏)¹, Li Yunju (李云居)¹, Su Jun (苏俊)¹, Bai Xixiang (白希祥)¹, Chen Yongshou (陈永寿)¹, Fan Qiwen (樊启文)¹, Jin Sunjun (金孙均)¹, Li Ertao (李二涛)¹, Li Zhichang (李志常)¹, Lian Gang (连钢)¹, Liu Xin (刘鑫)¹, Liu Jiancheng (刘建成)¹, Shu Nengchuan (舒能川)¹, Wang Baoxiang (王宝祥)¹, Wang Youbao (王友宝)¹, Yan Shengquan (颜胜权)¹, Zeng Sheng (曾晟)¹, Liu Weiping (柳卫平)¹, Pang Danyang (庞丹阳)², Lugaro M.³ and Buntain J.³

Published under licence by IOP Publishing Ltd
Plasma Science and Technology, Volume 14, Number 5 Citation Guo Bing et al 2012 Plasma Sci. Technol. 14 357 DOI 10.1088/1009-0630/14/5/01

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Author affiliations

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

Dates

Received 17 May 2011
Accepted 3 August 2011

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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 (E_x = 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.

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