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

GUO Bing (郭冰); LI Zhihong (李志宏); LI Yunju (李云居); SU Jun (苏俊); BAI Xixiang (白希祥); CHEN Yongshou (陈永寿); FAN Qiwen (樊启文); JIN Sunjun (金孙均); LI Ertao (李二涛); LI Zhichang (李志常); LIAN Gang (连钢); et al

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

Plasma Science and Technology > 2012 > 14(5): 357-359. > DOI: 10.1088/1009-0630/14/5/01

GUO Bing (郭冰), LI Zhihong (李志宏), LI Yunju (李云居), SU Jun (苏俊), BAI Xixiang (白希祥), CHEN Yongshou (陈永寿), FAN Qiwen (樊启文), JIN Sunjun (金孙均), LI Ertao (李二涛), LI Zhichang (李志常), LIAN Gang (连钢), et al. Indirect Measurement of Astrophysical ¹³C(α,n)¹⁶O S-Factors[J]. Plasma Science and Technology, 2012, 14(5): 357-359. DOI: 10.1088/1009-0630/14/5/01

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

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 .Centre for Stellar and Planetary Astrophysics, Monash University, Clayton 3800, Victoria, Australia

Funds: supported by the National Basic Research Program of China under Grant No 2007CB815003, the National Natural Science Foundation of China (Nos. 10705053, 11021504, 10720101076, 10735100 and 10975193)

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Received Date: May 16, 2011

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Abstract

Abstract

The ¹³C(α,n)¹⁶O reaction is believed to be the main neutron source reaction for the s-process in 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.
- Transfer reaction,
- elastic scattering,
- s-process

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