Predicting and verifying transition strengths from weakly bound molecules

Details Predicting and verifying transition strengths from weakly bound molecules Predicting and verifying transition strengths from weakly bound molecules

2010-11-05

arxiv.org/abs/1011.1319v1

Physics

Atomic Physics

7 pages, 7 figures

Scientific paper

We investigated transition strengths from ultracold weakly bound 41K87Rb molecules produced via the photoassociation of laser-cooled atoms. An accurate potential energy curve of the excited state (3)1Sigma+ was constructed by carrying out direct potential fit analysis of rotational spectra obtained via depletion spectroscopy. Vibrational energies and rotational constants extracted from the depletion spectra of v'=41-50 levels were combined with the results of the previous spectroscopic study, and they were used for modifying an ab initio potential. An accuracy of 0.14% in vibrational level spacing and 0.3% in rotational constants was sufficient to predict the large observed variation in transition strengths among the vibrational levels. Our results show that transition strengths from weakly bound molecules are a good measure of the accuracy of an excited state potential.

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