title: Accurate determination of the rotational constants of ultracold molecules using double photoassociation spectroscopy.
abstract: We report on an accurate determination of the rotational constants of the ultracold long-range Cesium molecules in near dissociation domain. The scheme relies on a precise reference of the frequency difference in a double photoassociation spectroscopy induced by two laser beams based on an acoustic-optical modulator. The rotational constants are obtained by fitting a non-rigid rotor model into the frequency intervals of the neighboring rotational levels deduced from the reference.
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.forename: Yuqing
authors.initials: Y
authors.lastname: Li
authors.forename: Wenliang
authors.initials: W
authors.lastname: Liu
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
authors.forename: Guosheng
authors.initials: G
authors.lastname: Feng
authors.forename: Chenyang
authors.initials: C
authors.lastname: Hu
authors.forename: Jizhou
authors.initials: J
authors.lastname: Wu
authors.forename: Liantuan
authors.initials: L
authors.lastname: Xiao
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia