$^{19}$ F的最低宽α团簇共振
The Lowest Broad Alpha Cluster Resonances in $^{19}$F
摘要：
在接近α衰变阈值的$^{19}$ F态的结构中有着深刻的天体物理学兴趣。这些国家的原子核结构是重要的理解的发展$α$集群在$^{20}$ Ne区域。簇态的出现和有利于耦合到相应的衰变阈值附近的反应通道的一般状态是当前理论物理中特别感兴趣的。通过TTIK方法测量了$^{15}$ N（$α$，$α$）弹性散射的激发函数。这些新的数据与旧的，高能量分辨率的数据，使用R矩阵的方法进行了分析。用组态相互作用方法和新近发展的有效相互作用哈密顿量计算了$^{19}$ F原子核结构。确定了$^{19}$ F中接近$α$衰变阈值的宽低自旋$\ell = 0$和1相对分波共振参数。进行了详细的理论分析，识别耦合到$\ell = 0$和1 α簇通道的所有状态。考虑具有不同谐振子壳激发的状态的层次结构允许评估与相对波函数中具有不同节点数的α通道的耦合，并且有助于解释集群强度的分布和宽集群共振的出现。比较$^{20}$ Ne到$^{16}$ O+ $α$中的聚簇和考虑$^{15}$ N+ $α$通道的自旋-轨道分裂提供了额外的证据。新的和旧的实验数据的详细分析，可以确定一系列的$α$集群共振在$^{19}$ F和评估的集群强度的分布，这是重要的天体物理学问题和多体物理学的理论理解和集群的出现在松散的约束或不稳定的核。
英文摘要：
There is a deep astrophysical interest in the structure of $^{19}$F states close to the alpha decay threshold. The nuclear structure of these states is important for understanding of the development of $α$ clustering in the $^{20}$Ne region. Emergence of clustered states and generally states that favor coupling to reaction channels near the corresponding decay thresholds is currently of special interest in theoretical physics. Excitation function for $^{15}$N($α$,$α$) elastic scattering was measured by the TTIK method. These new data together with old, high energy resolution data, were analyzed using the R matrix approach. $^{19}$F nuclear structure was calculated using configuration interaction methods with the recently developed effective interaction Hamiltonian. The parameters of broad low spin $\ell = 0$ and 1 relative partial wave resonances close to the $α$ decay threshold in $^{19}$F were identified. Detailed theoretical analysis was carried out identifying all states coupled to the $\ell = 0$ and 1 alpha cluster channels. Considering hierarchy of states with different harmonic oscillator shell excitations allows to evaluate coupling to the alpha channels with different number of nodes in the relative wave function and helps to explain the distribution of the clustering strength and emergence of broad clustering resonances. Comparison of clustering in $^{20}$Ne into $^{16}$O+$α$ and consideration of spin-orbit splitting of the $^{15}$N+$α$ channel provides additional evidence. Detailed analysis of new and old experimental data allows to identify a series of $α$ clustering resonances in $^{19}$F and to assess the distribution of the clustering strength which is of importance to questions of astrophysics and for theoretical understanding of many-body physics and emergence of clustering in loosely bound or unstable nuclei.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
