High resolution photoassociation spectra of an ultracold Cs_2 long-range 0_u^+ (6S_(1/2)+6P_(1/2) ) state  

作　　者：陈鹏 李玉清 张一驰 武寄洲 马杰 肖连团 贾锁堂 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Laser Spectroscopy Laboratory,Shanxi University

出　　处：《Chinese Physics B》2013年第9期376-380,共5页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2012CB921603);the National High Technology Research and Development Program of China (Grant No. 2011AA010801);the National Natural Science Foundation of China (Grant Nos. 61008012 and 10934004);the International Science and Technology Cooperation Program of China (Grant No. 2001DFA12490);the Project for Excellent Research Team of the National Natural Science Foundation of China (Grant No. 61121064);the New Teacher Fund of the Ministry of Education of China (Grant No. 20101401120004)

摘　　要：In this paper, ultracold cesium molecules are formed through photoassociation technology, which is carried out in a magneto-optical trap. High resolution photoassociaion spectra with the rotational progressions up to J = 7 are obtained. Three rovibrational levels of the long-range 0＋ state of Cs2 below the （6S1/2 ＋ 6P1/2） dissociation limit are specifically investigated. By fitting their binding energy intervals to the non-rigid rotational model, the rotational constant of the long- range 0u＋ state is determined. A proportional dependence of the value of the rotational constant on the vibrational quantum number is demonstrated.In this paper, ultracold cesium molecules are formed through photoassociation technology, which is carried out in a magneto-optical trap. High resolution photoassociaion spectra with the rotational progressions up to J = 7 are obtained. Three rovibrational levels of the long-range 0＋ state of Cs2 below the （6S1/2 ＋ 6P1/2） dissociation limit are specifically investigated. By fitting their binding energy intervals to the non-rigid rotational model, the rotational constant of the long- range 0u＋ state is determined. A proportional dependence of the value of the rotational constant on the vibrational quantum number is demonstrated.

关 键 词：ultracold molecules PHOTOASSOCIATION trap-loss spectrum long-range molecular coefficient 

分 类 号：O561.3[理学—原子与分子物理] X783.4[理学—物理]