铯原子6S1/2 + 6P1/2和6S1/2 + 6P3/2渐近线处Cs2 0g(-)、0u(+)和1g态的新观测与综合分析

New observation and combined analysis of the Cs2 0g(-), 0u(+), and 1g states at the asymptotes 6S1/2 + 6P1/2 and 6S1/2 + 6P3/2.

作者信息

Ma Jie, Liu Wenliang, Yang Jinxin, Wu Jizhou, Sun Weiguo, Ivanov Valery S, Skublov Alexei S, Sovkov Vladimir B, Dai Xingcan, Jia Suotang

机构信息

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China.

State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.

出版信息

J Chem Phys. 2014 Dec 28;141(24):244310. doi: 10.1063/1.4904265.

DOI:10.1063/1.4904265

PMID:25554154

Abstract

We report on new observations of the photoassociation spectroscopy of ultracold cesium molecules using a highly sensitive detection technique and a combined analysis with all observed electronic states. The technique is achieved by directly modulating the frequency of the trapping lasers of a magneto-optical trap. New observations of the Cs2 0g(-), 0u(+), and 1g states at the asymptotes 6S1/2 + 6P1/2 and 6S1/2 + 6P3/2 are reported. The spectral range is extended to the red detuning of 112 cm(-1) below the 6S1/2 + 6P3/2 dissociation limit. Dozens of vibrational levels of the ultracold Cs2 0g(-), 0u(+), and 1g states are observed for the first time. The available experimental binding energies of these states are analyzed simultaneously in a framework of the generalized LeRoy-Bernstein theory and the almost degenerate perturbation theory by Marinescu and Dalgarno [Phys. Rev. A: At., Mol., Opt. Phys. 52, 311 (1995)]. The unique atomic-related parameter c3 governing the dispersion forces of all the molecular states is estimated as (10.29 ± 0.05) a.u.

摘要

我们报告了使用高灵敏度检测技术对超冷铯分子进行光缔合光谱的新观测结果，并对所有观测到的电子态进行了综合分析。该技术是通过直接调制磁光阱捕获激光的频率来实现的。报告了在渐近线6S1/2 + 6P1/2和6S1/2 + 6P3/2处对Cs2 0g(-)、0u(+)和1g态的新观测结果。光谱范围扩展到低于6S1/2 + 6P3/2离解极限112 cm(-1)的红失谐。首次观测到超冷Cs2 0g(-)、0u(+)和1g态的数十个振动态。在广义勒罗伊 - 伯恩斯坦理论以及马林斯库和达尔加诺的近简并微扰理论框架下[《物理评论A：原子、分子、光学物理》52, 311 (1995)]，同时分析了这些态现有的实验结合能。控制所有分子态色散力的独特原子相关参数c3估计为(10.29 ± 0.05)原子单位。