Determination of static dipole polarizabilities of Yb atom  

作　　者：Zhi-Ming Tang Yan-Mei Yu Chen-Zhong Dong 唐志明;于艳梅;董晨钟(Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences;Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province,College of Physics and Electronic Engineering, Northwest Normal University)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China [2]Key Laboratory of Atomic and Molecular Physics ＆ Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

出　　处：《Chinese Physics B》2018年第6期220-224,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.91536106 and U1332206);the Strategic Priority Research Program(Category B)of the Chinese Academy of Sciences(Grant No.21030300);the National Key Research and Development Program of China(Grant No.2016YFA0302104)

摘　　要：We determine the static values of the scalar and tensor dipole polarizabilities of the ground, 6s6p^3P0~o, and 6s6p^3P1~o states of the Yb atom. These results can be useful in many experiments undertaken using this atom. We employed a combined configuration interaction（CI） method and a second-order many-body perturbation theory（MBPT） to evaluate energies and electric dipole（E1） matrix elements of many low-lying excited states of the above atom. These values are compared with the other available theoretical calculations and experimental values. By combining these E1 matrix elements with the experimental excitation energies, we estimate the dominant valence correlation contributions to the dipole polarizabilities of the above states. The core contribution is obtained from the finite field approach. We also compare these values with the other theoretical results as there are no precise experimental values that are available for these properties.We determine the static values of the scalar and tensor dipole polarizabilities of the ground, 6s6p^3P0~o, and 6s6p^3P1~o states of the Yb atom. These results can be useful in many experiments undertaken using this atom. We employed a combined configuration interaction（CI） method and a second-order many-body perturbation theory（MBPT） to evaluate energies and electric dipole（E1） matrix elements of many low-lying excited states of the above atom. These values are compared with the other available theoretical calculations and experimental values. By combining these E1 matrix elements with the experimental excitation energies, we estimate the dominant valence correlation contributions to the dipole polarizabilities of the above states. The core contribution is obtained from the finite field approach. We also compare these values with the other theoretical results as there are no precise experimental values that are available for these properties.

关 键 词：ytterbium atom POLARIZABILITIES configuration interaction many-body perturbation 

分 类 号：O4[理学—物理]