First direct measurement of the C-11(alpha, p)N-14 stellar reaction by an extended thick-target method

作者：Hayakawa, S.^*; Kubono, S.; Kahl, D.; Yamaguchi, H.; Binh, D. N.; Hashimoto, T.; Wakabayashi, Y.; He, J. J.; Iwasa, N.; Kato, S.; Komatsubara, T.; Kwon, Y. K.; Teranishi, T.

来源：PHYSICAL REVIEW C, 2016, 93(6): 065802.

DOI：10.1103/PhysRevC.93.065802

• PARTICLE REACTIONS
• ALPHA
• PROTON
• N-14

The C-11(alpha, p)N-14 reaction is an important alpha-induced reaction competing with beta-limited hydrogen-burning processes in high-temperature explosive stars. We directly measured its reaction cross sections both for the ground-state transition (alpha, p(0)) and the excited-state transitions (alpha, p(1)) and (alpha, p(2)) at relevant stellar energies 1.3-4.5 MeV by an extended thick-target method featuring time of flight for the first time. We revised the reaction rate by numerical integration including the (alpha, p(1)) and (alpha, p(2)) contributions and also low-lying resonances of (alpha, p(0)) using both the present and the previous experimental data which were totally neglected in the previous compilation works. The present total reaction rate lies between the previous (alpha, p(0)) rate and the total rate of the Hauser-Feshbach statistical model calculation, which is consistent with the relevant explosive hydrogen-burning scenarios such as the vp process.

• 出版日期2016-6-7
• 单位RIKEN; 中国科学院近代物理研究所