论文标题
约束$^{22} $ ne（$α$，$γ$）$^{26} $ mg和$^{22} $ ne（$α$，n）$^{25} $ mg反应率，使用子库仑$α$ - 转移反应
Constraining the $^{22}$Ne($α$,$γ$)$^{26}$Mg and $^{22}$Ne($α$,n)$^{25}$Mg reaction rates using sub-Coulomb $α$-transfer reactions
论文作者
论文摘要
$^{22} $ ne（$α$，$γ$）$^{26} $ mg和$^{22} $ ne（$α$，n）$^{25} $ mg反应在天体物理学中起着重要作用，因为它们在S-Process弱分支中对中子的变化具有重大影响。我们通过测量位于Gamow窗口中的$^{26} $ mg中的部分$α$ widths的共鸣来限制这些反应的天体物理率。这些共振是使用$^{22} $ ne（$^6 $ li，d）$^{26} $ mg和$^{22} $ ne（$^7 $ li，t）$^{26} $ mg Reactions在COULOMB屏障附近的Energies。在这些低能量下，$α$ - 转移反应有利于低自旋状态的种群，而所提取的部分$α$ widths对于观察到的共振仅表现出对模型参数的微小依赖性。 $^{22} $ ne（$α$，$γ$）$^{26} $ mg和$^{22} $ ne（$α$，n）$^{25} $ mg反应都与先前建议的值显着不同。
The $^{22}$Ne($α$,$γ$)$^{26}$Mg and $^{22}$Ne($α$,n)$^{25}$Mg reactions play an important role in astrophysics because they have significant influence on the neutron flux during the weak branch of the s-process. We constrain the astrophysical rates for these reactions by measuring partial $α$-widths of resonances in $^{26}$Mg located in the Gamow window for the $^{22}$Ne+$α$ capture. These resonances were populated using $^{22}$Ne($^6$Li,d)$^{26}$Mg and $^{22}$Ne($^7$Li,t)$^{26}$Mg reactions at energies near the Coulomb barrier. At these low energies $α$-transfer reactions favor population of low spin states and the extracted partial $α$-widths for the observed resonances exhibit only minor dependence on the model parameters. The astrophysical rates for both the $^{22}$Ne($α$,$γ$)$^{26}$Mg and the $^{22}$Ne($α$,n)$^{25}$Mg reactions are shown to be significantly different than the previously suggested values.
