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Abstract

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.

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1.
Funds:Project supported by the National Basic Research Program of China (Grant No. 2012CB921603), International S & T Cooperation Program of China (Grant No. 2011DFA12490), National Natural Science Foundation of China (Grant Nos. 10934004, 60978018, 61008012, 60808009 , 61078001, 60978001), Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 61121064), International S & T Cooperation Program of Shanxi Province, China (Grant No. 2011081030) and National Natural Science Foundation of Shanxi Province, China (Grant No. 2011011004).

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Vol. 61, Issue 21 - 2012-11-05

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