论文标题
构型混合对过渡核的四极和八杆核的影响
Effect of configuration mixing on quadrupole and octupole collective states of transitional nuclei
论文作者
论文摘要
提出了一个模型，该模型同时描述了基于核密度功能理论和相互作用的玻色子模型的理论框架内的形状共存和四杆和八极集体集体激励。一种最佳的相互作用 - 玻色子哈密顿量，它结合了正常状态和入侵者之间的配置混合以及八极的自由度，可以通过使用通用能量密度函数和配对相互作用的自我均值均值计算来鉴定，并在自由型上进行了约束，并在轴向上进行了轴承式的效果，并具有轴承型的速度。对过渡性核$^{72} $ ge，$^{74} $ se，$^{74} $ kr和$^{76} $ kr的说明性应用球形，弱变形的植物和强烈变形的斜长形状。低洼的负态状态被证明是由变形的入侵者配置所支配的。
A model is presented that simultaneously describes shape coexistence and quadrupole and octupole collective excitations within a theoretical framework based on the nuclear density functional theory and the interacting boson model. An optimal interacting-boson Hamiltonian that incorporates the configuration mixing between normal and intruder states, as well as the octupole degrees of freedom, is identified by means of self-consistent mean-field calculations using a universal energy density functional and a pairing interaction, with constraints on the triaxial quadrupole and the axially-symmetric quadrupole and octupole shape degrees of freedom. An illustrative application to the transitional nuclei $^{72}$Ge, $^{74}$Se, $^{74}$Kr, and $^{76}$Kr shows that the inclusion of the intruder states and the configuration mixing significantly lower the energy levels of the excited $0^+$ states, and that the predicted low-lying positive-parity states are characterized by the strong admixture of nearly spherical, weakly deformed oblate, and strongly deformed prolate shapes. The low-lying negative-parity states are shown to be dominated by the deformed intruder configurations.
