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用角动量投影壳模型研究了~(188)Pb核素的形状共存.实验数据经过计算结果的分析,指出~(188)Pb的低能激发态存在着对应于不同内部粒子组态的球形基态、扁椭球和长椭球三种形状的共存;预言了质子h9/2两粒子-两空穴扁椭球带;指出长椭球带是两种多粒子-空穴激发组态的混杂,并导出了混合系数.由这些系数,可以说明中子i_(13/2)破对引起的顺排对长椭球带的影响是一个渐进过程;并指出了2~+态的能量范围在804-880keV.
The shape coexistence of ~ (188) Pb nuclides was studied by using angular momentum projection shell model. The experimental results show that the low-energy excited states of ~ (188) Pb exist coexistence of three kinds of shapes: spherical ground state, oblate ellipsoid and ellipsoidal sphere corresponding to different internal particle configurations. The proton h9 / 2 Two-particle-two-cavity alluvial spherulites; Pointed ellipsoid banding is a hybrid of two multi-particle-hole excitation configurations, and the mixing coefficients are derived. From these coefficients, it can be shown that the influence of the row-wise neutron i_ (13/2) breaking on the ellipsoidal zone is a gradual process; and the energy range of 2 ~ + state is 804-880keV.