共振$^{17}$ O+ $α$弹性散射中的$^{21}$ Ne能级结构
$^{21}$Ne level structure in the resonance $^{17}$O+$α$ elastic scattering
摘要：
利用厚靶逆运动学（TTIK）方法首次研究了$^{17}$ O+ $α$弹性散射中的共振现象。在$\textit{R}$ -矩阵方法的框架中分析数据。在9-13 MeV激发能量的$^{21}$ Ne激发区发现了许多$α$ -簇态，包括在奇偶核中首次观察到宽的$\textit{l}$ =0态，这可能是$^{20}$ Ne中8 MeV宽的0 $^+$的类似物。在$^{21}$ Ne中观察到的结构似乎与$^{16}$ O+ $α$共振散射中填充的$^{20}$ Ne中的结构惊人地相似。结果也是有用的数据的$^{17}$ O（$α$，$\textit{n}$）反应的天体物理学重要的改进。
英文摘要：
The first study of resonances in $^{17}$O+$α$ elastic scattering was carried out using the Thick Target Inverse Kinematics (TTIK) method. The data were analyzed in the framework of an $\textit{R}$-matrix approach. Many $α$-cluster states were found in the $^{21}$Ne excitation region of the 9-13 MeV excitation energy including the first observation of a broad $\textit{l}$=0 state in an odd-even nucleus, which is likely the analog of the broad 0$^+$ at 8 MeV in $^{20}$Ne. The observed structure in $^{21}$Ne appeared to be strikingly similar to that in $^{20}$Ne populated in the resonance $^{16}$O+$α$ scattering. The results are also useful for refinement of data on an $^{17}$O($α$,$\textit{n}$) reaction important for astrophysics.
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