Observation of Photoassociation Spectra of Ultracold ^(174)Yb Atoms at ^(1)S_(0)-^(3)P_(1) Inter-Combination Line  

作　　者：LONG Yun XIONG Zhuan-Xian ZHANG Xi ZHANG Meng-Jiao LÜBao-Long HE Ling-Xiang 龙云;熊转贤;张曦;张梦娇;吕宝龙;贺凌翔(Key Laboratory of Atomic Frequency Standards(KLAFS),Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]Key Laboratory of Atomic Frequency Standards(KLAFS),Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071 [2]University of Chinese Academy of Sciences,Beijing 100049

出　　处：《Chinese Physics Letters》2013年第7期68-71,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11274349,11204353 and 61227805;the National Key Basic Research Program of China under Grant No 2011CB921503.

摘　　要：Photoassociation(PA)of cold atoms is a key tool widely used for accurate determination of long-range molecular potentials,measurement and tuning of interatomic interactions,as well as creation of desired cold molecules.We report the observation of PA spectra of ultracold ytterbium(Yb)atoms at the ^(1)S_(0)–^(3)P_(1) inter-combination line by detecting the resonant loss of atoms trapped in a crossed far-off-resonance trap(crossed-FORT).Eight vibrational levels in the ^(1)0^(+)_(u) molecular state are observed for PA laser detunings up to 1 GHz with respect to the atomic resonance.The photoassociation resonances have a Lorentzian shape and sub-MHz linewidths due to the ultra low temperature of the atoms,and the resonance positions agree well with that predicted by the semiclassical formula.

关 键 词：formula. resonant VIBRATIONAL 

分 类 号：O56[理学—原子与分子物理]