Low-energy dipole excitation mode in ^{18} 18 O with antisymmetrized molecular dynamics
Low-energy dipole excitation mode in ^{18} 18 O with antisymmetrized molecular dynamics
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^{18} 18 O 中具有反对称分子动力学的低能偶极子激发模式
DOI：
10.1103/physrevc.103.034312
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发表时间：
2021
影响因子：
3.1
通讯作者：
Yoshiko Kanada-En'yo
中科院分区：
文献类型：
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作者：
Yuki Shikata;Yoshiko Kanada-En'yo
在反对称分子动力学框架下，结合后投影变换和生成元坐标方法，研究了低能偶极子(LED)的激发。我们得到了两种发光状态，即具有主要壳层模型结构的状态和具有大簇成分的状态。这两个态都具有显著的环向偶极子(TD)和压缩偶极子(CD)强度，表明在LED的激发中，TD和CD模不是分开的，而是混合在一起的。这不同于对于形变良好的原子核的CD和TD模，例如，CD和TD模分别是在大变形状态下产生的。
Low-energy dipole (LED) excitations inwere investigated using a combination of the variation afterprojection in the framework of antisymmetrized molecular dynamics withconstraint with the generator coordinate method. We obtained two LED states, namely, thestate with a dominant shell-model structure and thestate with a largecluster component. Both these states had significant toroidal dipole (TD) and compressive dipole (CD) strengths, indicating that the TD and CD modes are not separated but mixed in the LED excitations of. This is unlike the CD and TD modes for well-deformed nuclei such as, where the CD and TD modes are generated asandexcitations, respectively, in a largely deformed state.