Ultracold polar RbCs molecules are produced via photoassociation in a laser-cooled mixture of ^85Rb and ^133Cs atoms. The a3∑＋ state molecules which decay from electronically excited （2）0- state RbCs molecules are...Ultracold polar RbCs molecules are produced via photoassociation in a laser-cooled mixture of ^85Rb and ^133Cs atoms. The a3∑＋ state molecules which decay from electronically excited （2）0- state RbCs molecules are detected by resonance- enhanced two-photon ionization. The new rovibrational levels （v = 189, 190） in the （2）0- state are also observed, which exist in theory and have not been observed in experiments yet. The corresponding rotational constants are measured by photoassociation spectroscopy, which are consistent with theoretical calculations using a nonrigid rotor model.展开更多
基金supported by the National Basic Research Program of China (Grant No. 2012CB921603)the International Science & Technology Cooperation Program of China (Grant No. 2011DFA12490)+1 种基金the National Natural Science Foundation of China (Grant Nos. 61275209, 10934004, and 11004125)the National Natural Science Foundation for Excellent Research Team, China (Grant No. 61121064)
文摘Ultracold polar RbCs molecules are produced via photoassociation in a laser-cooled mixture of ^85Rb and ^133Cs atoms. The a3∑＋ state molecules which decay from electronically excited （2）0- state RbCs molecules are detected by resonance- enhanced two-photon ionization. The new rovibrational levels （v = 189, 190） in the （2）0- state are also observed, which exist in theory and have not been observed in experiments yet. The corresponding rotational constants are measured by photoassociation spectroscopy, which are consistent with theoretical calculations using a nonrigid rotor model.
