超冷铷铯极性分子振转光谱的实验研究  

Experimental study of rovibrational spectrum of ultracold polar RbCs molecules

作　　者：杨艳[1] 姬中华[1] 元晋鹏[1] 汪丽蓉[1] 赵延霆[1] 马杰[1] 肖连团[1] 贾锁堂[1] 

机构地区：[1]量子光学与光量子器件国家重点实验室、山西大学激光光谱实验室,太原030006

出　　处：《物理学报》2012年第21期189-195,共7页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2012CB921603);国家国际科技合作专项(批准号:2011DFA12490);国家自然科学基金(批准号:10934004,60978018,61008012,60808009,61078001,60978001);国家基金委创新研究群体(批准号:61121064);山西省国际合作项目(批准号:2011081030);山西省自然科学基金(批准号:2011011004)资助的课题~~

摘　　要：利用激光冷却俘获技术在双暗磁光阱中获得高密度的超冷铷原子和铯原子,通过光缔合方法制备超冷铷铯极性分子.采用共振增强双光子电离技术探测基三重态a^3∑^+的铷铯分子,产率约为10~4/s.通过改变缔合光频率,获得(2)0^+,(3)0^-,(2)0^-等分子态的高分辨振转光谱,拟合得到相应的转动常数分别为0.00349 cm^(-1),0.00649 cm^(-1),0.00372 cm^(-1).Ultracold polar RbCs molecules are produced via photoassociation in a dual dark-SPOT magneto-optical trap, in which ultracold rubidium and cesium atoms with high densities are formed by laser cooling and trapping. The a3∑＋ triplet metastable state ultracold RbCs molecules with 104/s production rate are detected using resonance-enhanced two-photon ionization. The ultra-high resolution rovibrational spectra of （2）0＋, （3）0- and （2）0- rovibrational states are observed by scanning the photoassociation laser frequency. The rotational constants of （2）0＋, （3）0- and （2）0- vibrational states are 0.00349 cm-1, 0.00649 cm-1 and 0.00372 cm-1 by fitting respectively.

关 键 词：光缔合 超冷铷铯分子 振转光谱 

分 类 号：O561.3[理学—原子与分子物理]