skip to main content

SciTech ConnectSciTech Connect

Title: Laser cooling of MgCl and MgBr in theoretical approach

Ab initio calculations for three low-lying electronic states (X{sup 2}Σ{sup +}, A{sup 2}Π, and 2{sup 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 f{sub 00} for A{sup 2}Π{sub 3/2,1/2} (υ′ = 0) → X{sup 2}Σ{sup +}{sub 1/2} (υ″ = 0) are determined for both MgCl and MgBr molecules. Suitable radiative lifetimes τ of A{sup 2}Π{sub 3/2,1/2} (υ′ = 0) states for rapid laser cooling are also obtained. The proposed laser drives A{sup 2}Π{sub 3/2} (υ′ = 0) → X{sup 2}Σ{sup +}{sub 1/2} (υ″ = 0) transition by using three wavelengths (main pump laser λ{sub 00}; two repumping lasers λ{sub 10} and λ{sub 21}). These results indicate the probability of laser cooling MgCl and MgBr molecules.
Authors:
; ; ; ; ; ;  [1] ;  [2]
  1. Computational Physics Key Laboratory of Sichuan Province, Yibin University, Yibin 644007 (China)
  2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 (China)
Publication Date:
OSTI Identifier:
22490894
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 97 MATHEMATICAL METHODS AND COMPUTING; CONFIGURATION INTERACTION; EXPERIMENTAL DATA; LASERS; L-S COUPLING; MOLECULES; PROBABILITY; RELATIVISTIC RANGE; WAVELENGTHS