论文标题
ZR和MO同位素中的核形状演化和形状共存
Nuclear shape evolution and shape coexistence in Zr and Mo isotopes
论文作者
论文摘要
形状进化和形状共存的现象是通过使用协变量密度函数理论（CDFT），与密度依赖性点耦合参数集合DD-PCX和DD-PC1和DD-PC1，并配对配对。介绍了结合能，两种中子分离能，两中性分离能的差异变化和RMS电荷半径作为中子数的函数的结果，并与可用的实验数据进行了比较。除了$^{96-110} $ zr同位素中的扁面状形状共存外，还检查了形状过渡与不连续性之间的相关性。 MO同位素中电荷半径的平滑趋势被发现是由于三轴性柔软度的表现。观察到的扁平和极小的最小值与中子和质子的费米水平周围的单粒子能级密度低有关。当前的计算还预测了$^{100} $ ZR同位素中的变形气泡结构。
The phenomena of shape evolution and shape coexistence in even-even $^{88-126}$Zr and $^{88-126}$Mo isotopes is studied by employing covariant density functional theory (CDFT) with density-dependent point coupling parameter sets DD-PCX and DD-PC1, and with separable pairing interaction. The results for rms deviation in binding energies, two-neutron separation energy, the differential variation of two-neutron separation energy, and rms charge radii, as a function of neutron number, are presented and compared with available experimental data. In addition to the oblate-prolate shape coexistence in $^{96-110}$Zr isotopes, the correlation between shape transition and discontinuity in the observables are also examined. A smooth trend of charge radii in Mo isotopes is found to be due to the manifestation of triaxiality softness. The observed oblate and prolate minima are related to the low single-particle energy level density around the Fermi level of neutron and proton respectively. The present calculations also predict a deformed bubble structure in $^{100}$Zr isotope.
