Cluster structures and monopole transitions of C14
Cluster structures and monopole transitions of C14
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DOI：
10.1103/physrevc.101.014317
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发表时间：
2019-09
影响因子：
3.1
通讯作者：
Y. Kanada-En’yo;K. Ogata
中科院分区：
文献类型：
--
作者：
Y. Kanada-En’yo;K. Ogata
采用反对称分子动力学 (AMD) 方法结合 $3\alpha+nn$ 簇模型研究了 $^{14}$C 的簇结构，同时重点关注单极子激发和线性链 $3\alpha$ 能带。在 AMD 框架中执行奇偶校验和角动量投影后的变化，并应用生成器坐标方法来考虑各种 $3\alpha+nn$ 簇配置。计算了 $0^+$、$2^+$ 和 $4^+$ 态的能谱以及单极子和 $E2$ 跃迁强度，以分配能带结构。获得具有显着单极跃迁的$0^+_3$状态作为三角形$3\alpha$配置的振动模式。此外，还获得了来自带头$0^+_4$状态的线性链$3\alpha$带。评估了 $0^+$、$2^+$ 和 $4^+$ 状态的 $^{10}$Be$+\alpha$ 衰减宽度。还通过使用$g$矩阵折叠模型的微观耦合通道计算来研究$\alpha$非弹性散射$^{14}$C，以提出通过$\alpha$散射实验观察$0^+_3$状态的可能性。
Cluster structures of $^{14}$C were investigated with a method of antisymmetrized molecular dynamics (AMD) combined with a $3\alpha+nn$ cluster model while focusing on the monopole excitations and linear-chain $3\alpha$ band. Variation after parity and angular momentum projections was performed in the AMD framework, and the generator coordinate method was applied to take into account various $3\alpha+nn$ cluster configurations. Energy spectra and monopole and $E2$ transition strengths of $0^+$, $2^+$, and $4^+$ states were calculated to assign band structures. The $0^+_3$ state with remarkable monopole transition was obtained as a vibrational mode of the triangle $3\alpha$ configuration. In addition, the linear-chain $3\alpha$ band from the band-head $0^+_4$ state was obtained. $^{10}$Be$+\alpha$ decay widths of $0^+$, $2^+$, and $4^+$ states were evaluated. $\alpha$ inelastic scattering off $^{14}$C was also investigated by the microscopic coupled-channel calculation with the $g$-matrix folding model to propose possible observation of the $0^+_3$ state via $\alpha$ scattering experiments.