Open AccessPrecise measurements of rotational constants of the pure long range state of ultracold cesium molecules
Author(s) -
Jie Ma,
Peng Chen,
Wenliang Li,
Feng Gao,
Yuqing Li,
Jizhou Wu,
Xiao Liu,
Suotang Jia
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.223301
Subject(s) - atomic physics , range (aeronautics) , caesium , ultracold atom , quantum number , physics , rotational transition , rotational spectroscopy , quantum , linear molecular geometry , molecule , materials science , quantum mechanics , angular momentum , nuclear physics , composite material
The high resolution spectrum of ultracold Cs2 pure long range 0g- state is experimentally measured using modulated trap loss spectroscopic technology. Based on Double photoassociation spectroscopic technique, precise frequency difference reference signals are constructed to accurately calibrate the resonant frequency intervals of the ro-vibrational levels, thus obtaining the relationship between the frequency interval of rotational level and the rotational quantum number. The experimental data are fitted by the non-rigid rotational model, and the molecular rotational constants corresponding to different vibrational levels in the ultracold Cs2 pure long range 0g- state are acquired. The experimental results demonstrate a linear decrease of the rotational constant with the increase of vibrational quantum number, and the linear decreasing rate is -0.41m MHz0.01 MHz.