Role of the tensor interaction in He isotopes with a tensor-optimized shell model
Role of the tensor interaction in He isotopes with a tensor-optimized shell model
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DOI：
10.1103/physrevc.84.034315
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发表时间：
2011-08
影响因子：
3.1
通讯作者：
T. Myo;A. Umeya;H. Toki;K. Ikeda
中科院分区：
文献类型：
--
作者：
T. Myo;A. Umeya;H. Toki;K. Ikeda
We studied the role of the tensor interaction in He isotopes systematically on the basis of the tensor-optimized shell model (TOSM). We use a bare nucleon-nucleon interaction AV8${}^{\ensuremath{'}}$ obtained from nucleon-nucleon scattering data. The short-range correlation is treated in the unitary correlation operator method (UCOM). Using the TOSM + UCOM approach, we investigate the role of tensor interaction on each spectrum in He isotopes. It is found that the tensor interaction enhances the $LS$ splitting energy observed in ${}^{5}$He, in which the ${p}_{1/2}$ and ${p}_{3/2}$ orbits play different roles on the tensor correlation. In ${}^{6,7,8}$He, the low-lying states containing extra neutrons in the ${p}_{3/2}$ orbit gain the tensor contribution. On the other hand, the excited states containing extra neutrons in the ${p}_{1/2}$ orbit lose the tensor contribution due to the Pauli-blocking effect with the $2p2h$ states in the ${}^{4}$He core configuration.
We studied the role of the tensor interaction in He isotopes systematically on the basis of the tensor-optimized shell model (TOSM). We use a bare nucleon-nucleon interaction AV8${}^{\ensuremath{'}}$ obtained from nucleon-nucleon scattering data. The short-range correlation is treated in the unitary correlation operator method (UCOM). Using the TOSM + UCOM approach, we investigate the role of tensor interaction on each spectrum in He isotopes. It is found that the tensor interaction enhances the $LS$ splitting energy observed in ${}^{5}$He, in which the ${p}_{1/2}$ and ${p}_{3/2}$ orbits play different roles on the tensor correlation. In ${}^{6,7,8}$He, the low-lying states containing extra neutrons in the ${p}_{3/2}$ orbit gain the tensor contribution. On the other hand, the excited states containing extra neutrons in the ${p}_{1/2}$ orbit lose the tensor contribution due to the Pauli-blocking effect with the $2p2h$ states in the ${}^{4}$He core configuration.