论文标题
$^{22} $ ne（$α$，n）$^{25} $ mg和$^{22} $ ne（$α$，$α$，$γ$）$^{22} $ ne（$α$，n）
$R$-matrix analysis of $^{22}$Ne($α$, n)$^{25}$Mg and $^{22}$Ne($α$, $γ$)$^{26}$Mg reaction
论文作者
论文摘要
$^{22} $ ne（$α$，n）$^{25} $ mg及其竞争频道$^{22} $ ne（$α$，$α$，$γ$）$^{26} $ mg对弱S-process核能中的弱S-process核体的中性磁体在低质量AGB AGB和Massive of Massive $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 10上具有重大影响。因此，这两个竞争反应的比率控制弱S过程中的中子通量。已经进行了各种实验，以研究$^{26} $ mg的核状态的性质，以评估$^{22} $ ne+$ ne+$ $ $ $ $ $ a $反应速率和这些研究的相应速率在天体物理相关温度中降至500倍。 Philip等人的最新评估。使用$^{22} $ ne（$α$，n）$^{25} $ mg反应速率使用$^{26} $ mg的最新核数据，来自源数量的$^{26} $ mg显示出相似的结果，与先前的估计相似，$^{22} $ ne（$α$，$γ$，$γ$）$^{26} $ mg，但获得了$^$ ne的$^$^$^$^} $^{22}， n）$^{25} $ mg反应由于更新的核数据。还有Philip等。建议将基于全$ R $ -Matrix建模的费率考虑到遥远水平和亚阈值共振之间的干扰效应。在目前的工作中，全$ r $ -matrix计算已经按$^{22} $ ne（$α$，n）$^{25} $ mg和$^{22} $ ne（$α$，$γ$，$γ$）$^{26} $ mg反应，该反应是$^{22} $ ne $ je $ je $ n ne） al;在能源范围为0.8至1.45 MEV和更新的$^{26} $ mg状态的核数据。 $ r $ -matrix拟合$^{22} $ ne（$α$，n）$^{25} $ mg反应通过更改旋转，E $ _x $ = 11.784和11.63 MEV的状态，从1 $^ - $^ - $^$^$^$^$^+$^+$^+$^+^+$^+$^+$^+$^+$^+$^+。
The $^{22}$Ne($α$, n)$^{25}$Mg and its competing channel $^{22}$Ne($α$, $γ$)$^{26}$Mg has an major influence on neutron flux in weak s-process nucleosynthesis path in low mass AGB stars and massive stars of mass (M$\geq$ 10M$_\odot$). So the ratio rate of this two competing reaction control the neutron flux in weak s-process nucleosynthesis. Various experiment has been performed to study the properties of nuclear states of $^{26}$Mg to evaluate rate of $^{22}$Ne+$α$ reaction rate and corresponding rate from these studies vary by up to a factor of 500 in the astrophysical relevant temperature. The recent evaluation by Philip et al. of $^{22}$Ne($α$, n)$^{25}$Mg reaction rate using most recent nuclear data of $^{26}$Mg from number of sources shows similar result with previous estimation for $^{22}$Ne($α$, $γ$)$^{26}$Mg but got lower rate for $^{22}$Ne($α$, n)$^{25}$Mg reaction due to updated nuclear data. Also Philip et al. suggested that rate based on full $R$-matrix modeling will required to take into accounted the interference effects between distant levels and sub-threshold resonance. In present work full $R$-matrix calculation has been performed for $^{22}$Ne($α$, n)$^{25}$Mg and $^{22}$Ne($α$, $γ$)$^{26}$Mg reaction based on fitting the $^{22}$Ne($α$, n)$^{25}$Mg reaction data of Jaeger et al; in energy range 0.8 to 1.45 MeV and updated nuclear data of $^{26}$Mg states. The $R$-matrix fitting for the $^{22}$Ne($α$, n)$^{25}$Mg reaction nicely explain experimental data in 0.8 to 1.45 MeV energy range by changing spin, parity of E$_x$ = 11.784 and 11.63 MeV states from 1$^-$ to 0$^+$.
