title: 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.
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.
authors.affiliation: 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.
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.affiliation: 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.
authors.forename: Wenliang
authors.initials: W
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
authors.forename: Jinxin
authors.initials: J
authors.lastname: Yang
authors.affiliation: 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.
authors.forename: Jizhou
authors.initials: J
authors.lastname: Wu
authors.affiliation: School of Physics and Chemistry, Research Center for Advanced Computation, Xihua University, Chengdu, Sichuan 610039, China.
authors.forename: Weiguo
authors.initials: W
authors.lastname: Sun
authors.affiliation: V.A. Fock Institute of Physics and Department of Physics of St. Petersburg State University, Ulyanovskaya Street 1, Petrodvoretz, St. Petersburg 198504, Russia.
authors.forename: Valery S
authors.initials: VS
authors.lastname: Ivanov
authors.affiliation: V.A. Fock Institute of Physics and Department of Physics of St. Petersburg State University, Ulyanovskaya Street 1, Petrodvoretz, St. Petersburg 198504, Russia.
authors.forename: Alexei S
authors.initials: AS
authors.lastname: Skublov
authors.affiliation: V.A. Fock Institute of Physics and Department of Physics of St. Petersburg State University, Ulyanovskaya Street 1, Petrodvoretz, St. Petersburg 198504, Russia.
authors.forename: Vladimir B
authors.initials: VB
authors.lastname: Sovkov
authors.affiliation: State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
authors.forename: Xingcan
authors.initials: X
authors.lastname: Dai
authors.affiliation: 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.
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia