Octupole deformation in even-even Rn-Th nuclei
Octupole deformation in even-even Rn-Th nuclei
复制标题
偶偶 Rn-Th 核中的八极变形
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Xu
中科院分区：
文献类型：
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作者：
Zhe;F. Xu
利用曲轴壳模型在多维变形空间（包括β（2）、β（3）、β（4）和β（5）自由度）系统研究了轻偶偶Rn-Th核的基态性质和高自旋光谱。计算很好地再现了转动惯量的实验值。对结构的研究表明，随着中子数的增加，这些原子核的基态形状从近球形（N接近130），经过充分发展的八极（N接近136）演变为充分变形的四极（N>=140）形状。曲柄计算显示，研究的原子核非常柔软，并且在高自旋时将恢复到反射对称形状。
The ground-state properties and high-spin spectra of the light even-even Rn-Th nuclei have been systematically investigated using the cranking shell model in a multidimentional deformation space, including beta(2), beta(3), beta(4) and beta(5) degrees of freedom. Calculations reproduce well the experimental values of the moment of inertia. The investigation of the structures shows that, with increasing neutron number, the ground-state shapes of these nuclei evolve from nearly spherical(N approximate to 130), through well-developed octupole (N approximate to 136) to well-deformed quadrupole (N >= 140) shapes. Cranking calculations display that the nuclei investigated axe very octupole soft and will restore to reflection-symmetric shapes at high spin.