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arXiv 1808.09299nucl-th
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双Gamow-Teller强度的原子核结构研究

Nuclear structure studies of double Gamow-Teller strength

N. Auerbach, Bui Minh Loc

摘要:

采用核壳模型,在母核的基态上连续两次应用单Gamow-Teller算符,计算了偶$A$钙同位素的双Gamow-Teller强度分布.确定了实际对结果有贡献的中间状态的数量。在全过程计算中,双Gamow-Teller算子的求和规则近似满足。在通过引入$f$ -能级的简并近似恢复对称性的情况下,以及在$fp$ -模型空间中引入$p$ -能级的情况下,与求和规则非常接近。

英文摘要:

The double Gamow-Teller strength distributions in even-$A$ Calcium isotopes were calculated using the nuclear shell model by applying the single Gamow-Teller operator two times sequentially on the ground state of the parent nucleus. The number of intermediate states actually contributing to the results was determined. The sum rules for the double Gamow-Teller operator in the full calculation were approximately fulfilled. In the case that the symmetry is restored approximately by introducing degeneracies of the $f$-levels, and the $p$-levels in the $fp$-model space, the agreement with the sum rules was very close.

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