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arXiv 0803.0540nucl-ex
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恒星温度下~（19）F（a，p）~（22）Ne反应的热核速率

The thermonuclear rate for the 19F(a,p)22Ne reaction at stellar temperatures

Claudio Ugalde, Richard Azuma, Aaron Couture, Joachim Görres, Hye-Young Lee, Edward Stech, Elizabeth Strandberg, Wanpeng Tan, Michael Wiescher

备注：
Accepted for publication in Phys Rev. C
发表信息：
Phys.Rev.C77:035801,2008
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摘要：

$^{19}$ F（$α$，p）$^{22}$ Ne反应被认为是AGB和Wolf-Rayet星中氟耗尽的主要来源之一。由于缺乏可用的实验研究，反应速率仍然保留很大的不确定性。在这项工作中的两个出口通道的基态和第一激发态的$^{22}$ Ne的产率已被测量和几个以前未观察到的共振已被发现在能量范围E $_{lab}$ =792-1993 keV。通过对反应数据的详细R矩阵分析确定了能级参数，并根据现有的实验信息提供了一个新的反应速率。

英文摘要：

The $^{19}$F($α$,p)$^{22}$Ne reaction is considered to be one of the main sources of fluorine depletion in AGB and Wolf-Rayet stars. The reaction rate still retains large uncertainties due to the lack of experimental studies available. In this work the yields for both exit channels to the ground state and first excited state of $^{22}$Ne have been measured and several previously unobserved resonances have been found in the energy range E$_{lab}$=792-1993 keV. The level parameters have been determined through a detailed R-matrix analysis of the reaction data and a new reaction rate is provided on the basis of the available experimental information.

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