title: Laser cooling of MgCl and MgBr in theoretical approach.
abstract: Ab initio calculations for three low-lying electronic states (X(2)Σ(+), A(2)Π, and 2(2)Π) of MgCl and MgBr molecules, including spin-orbit coupling, are performed using multi-reference configuration interaction plus Davidson correction method. The calculations involve all-electronic basis sets and Douglas-Kroll scalar relativistic correction. Spectroscopic parameters well agree with available theoretical and experimental data. Highly diagonally distributed Franck-Condon factors f00 for A(2)Π3/2,1/2 (υ' = 0) → X(2)Σ(+) 1/2 (υ″ = 0) are determined for both MgCl and MgBr molecules. Suitable radiative lifetimes τ of A(2)Π3/2,1/2 (υ' = 0) states for rapid laser cooling are also obtained. The proposed laser drives A(2)Π3/2 (υ' = 0) → X(2)Σ(+) 1/2 (υ″ = 0) transition by using three wavelengths (main pump laser λ00; two repumping lasers λ10 and λ21). These results indicate the probability of laser cooling MgCl and MgBr molecules.
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Mingjie
authors.initials: M
authors.lastname: Wan
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Juxiang
authors.initials: J
authors.lastname: Shao
authors.affiliation: Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Duohui
authors.initials: D
authors.lastname: Huang
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Junsheng
authors.initials: J
authors.lastname: Yang
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Qilong
authors.initials: Q
authors.lastname: Cao
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Chengguo
authors.initials: C
authors.lastname: Jin
authors.affiliation: Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007, China.
authors.forename: Fanhou
authors.initials: F
authors.lastname: Wang