Robustness of the octupole collectivity in 144Ba within the cranking covariant density functional theory in 3D lattice  

作　　者：Ze‑Kai Li Yuan‑Yuan Wang 

机构地区：[1]Mathematics and Physics Department,North China Electric Power University,Beijing 102206,China [2]Hebei Key Laboratory of Physics and Energy Technology,North China Electric Power University,Baoding 071000,China

出　　处：《Nuclear Science and Techniques》2024年第8期124-131,共8页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(NSFC)(No.12205097);the Fundamental Research Funds for the Central Universities(No.2024MS071)。

摘　　要：The octupole deformation and collectivity in octupole double-magic nucleus 144Ba are investigated using the Cranking covariant density functional theory in a three-dimensional lattice space.The reduced B(E3)transition probability is implemented for the first time in semiclassical approximation based on the microscopically calculated electric octupole moments.The available data,including the I-ωrelation and electric transitional probabilities B(E2)and B(E3)are well reproduced.Furthermore,it is shown that the ground state of 144Ba exhibits axial octupole and quadrupole deformations that persist up to high spins(I≈24h).

关 键 词：Octupole collectivity Cranking covariant density functional theory Rotational spectrum Electric transitional probabilities 

分 类 号：O571[理学—粒子物理与原子核物理]