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arXiv 2104.10499nucl-th
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~ 7 He原子核衰变性质的从头算研究

Detailed study of decay properties of 7He nucleus states in ab initio approach

D. M. Rodkin, Yu. M. Tchuvil'sky

摘要:

用从头算方法研究了奇异~ 7 He核的能量和衰变宽度。用无核壳模型和相应的外推方法计算了这些态的能谱。在大量数据上得到充分证明的Daejeon 16势用于计算。先前开发的NCSM为基础的方法,其中包括一种方法,用于构建集群通道的正交化函数的基础上,并在此方法中获得相应的渐近波函数匹配的集群形状因子的程序,适用于计算的水平的衰减宽度。证明了该方法的可能性,用于计算部分衰变宽度的核状态到各种渠道强烈不同类型的碎裂,自旋,角动量的相对运动,和振幅。所得结果与其他微观计算的结果进行了比较。

英文摘要:

The energies and decay widths of the states of the exotic 7He nucleus are studied in an ab initio approach. The spectrum of these states is calculated using No-Core Shell Model and corresponding extrapolation procedure. Well-proven on a large amount of data the Daejeon16 potential is used in the calculations. The previously developed NCSM-based approach, which includes a method for constructing the basis of orthogonalized functions of cluster channels and a procedure for matching the cluster form factors obtained within this method with the corresponding asymptotic wave functions, is applied to compute the decay widths of the levels. The possibilities of the approach for calculating the partial decay widths of nuclear states into various channels strongly differing in type of fragmentation, spin, angular momentum of relative motion, and amplitude are demonstrated. The results obtained are compared with the results of other microscopic calculations.

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