4.4 Article

The determination of the astrophysical S-factor of the direct 18O(p, γ)19F capture by the ANC method

期刊

EUROPEAN PHYSICAL JOURNAL A
卷 55, 期 7, 页码 -

出版社

SPRINGER
DOI: 10.1140/epja/i2019-12801-8

关键词

-

资金

  1. Czech Academy of Sciences [M10480902]
  2. AMVIS Project (Czech -American S T Cooperation) [LH11001]
  3. MEYS project Spiral 2-CZ [EF16-013/0001679]
  4. Italian Ministry of University and Research [RBFR082838 (FIRB2008)]

向作者/读者索取更多资源

The depletion of O-18 via the (p, gamma) capture competes with the (p, alpha) capture during the CNO cycles in AGB stars. Despite the fact that the (p, alpha) capture is dominant, the (p,gamma) can play an important role in mixing stages of the AGB star evolution. Here, we attempt to determine the astrophysical S-factor of the direct part of the O-18(p, gamma)F-19 capture by the indirect method of asymptotic normalization coefficients (ANC). We measure the differential cross section of the transfer reaction O-18(He-3, d)F-19 at a He-3 energy of 24.6 MeV. The measurement was performed on the cyclotron of the CANAM infrastructure of NPI in Re, Czech Republic, with the gas target consisting of the high-purity O-18 (99.9%). The reaction products were measured by eight Delta E-E telescopes composed of thin and thick silicon surface-barrier detectors. The parameters of the optical model for the input channel were deduced by means of the code ECIS and the analysis of transfer reactions to 12 levels of the F-19 nucleus up to 8.014 MeV was made by the code FRESCO. The deduced ANCs were then used to specify the direct contribution to the O-18(p, gamma)F-19 capture process and were compared with the mutually different results of two works.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据