中国物理B：英文版

Reanalysis of the photoassociation spectrum of 133Cs2 （6P3/2） lg state

Jie Ma, 李玉清, Jie Ma, 樊群超, 冯灏, 孙卫国, Liantuan Xiao, 贾锁堂

Published Jan 1, 2013• 0 citations

Abstract

Reanalysis of the photoassociation spectrum of the weakly binding (6S 1/2 + 6P 3/2 ) 1 g 133 Cs 2 levels, reported in the previous study J. Mol. Spectro. 255 (2009) 106], is performed by using a Lu-Fano graph coupled to the improved LeRoy-Bernstein formula including two additional modified terms. A more accurate coefficient (c 3 ) is obtained for the leading long-range potential (-c 3 /R 3 ) of a diatomic molecule.

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中国物理B：英文版

Reanalysis of the photoassociation spectrum of 133Cs2 （6P3/2） lg state

Jie Ma, 李玉清, Jie Ma, 樊群超, 冯灏, 孙卫国, Liantuan Xiao, 贾锁堂

Published Jan 1, 2013• 0 citations

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Abstract

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Reanalysis of the photoassociation spectrum of133Cs2(6P3/2) 1gstate

Jie Ma, Yuqing Li, Jizhou Wu +5 more

Chinese Physics BAug 1, 20130 citations

Weakly bound (6s1/2+ 6p1/2)0−gCs2levels analysed using the vibrational quantum defect: detection of two deeply bound (6s1/2+ 6p3/2)0−glevels

Laurence Pruvost, Haikel Jelassi

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We present an analysis of spectroscopic data concerning the long-range molecular state

(6{s}_{1∕2}+6{p}_{1∕2}){0}_{u}^{+}

^{133}\mathrm{Cs}_{2}

[M. Pichler, H. Chen, and W. C. Stwalley, J. Chem. Phys. 121, 1796 (2004)] by using the Lu-Fano method coupled to the improved LeRoy-Bernstein formula. The obtained Lu-Fano graph exhibits the coupling of molecular series to the

(6{s}_{1∕2}+6{p}_{3∕2}){0}_{u}^{+}

state. The coupling is due to the spin effects in the molecule. A two-channel model involving the improved LeRoy-Bernstein formula allows us to characterize the molecular series, to localize the perturbing levels, to evaluate the coupling in the vicinity of each perturbing level (five observed for Cs) in a two-level approach and in a more accurate multilevel description. Furthermore, we predict the energy and the width of the first predissociated level.

We report on cold atom photoassociation of

^{87}\mathrm{Rb}

giving spectroscopy data of the $(5{s}_{1∕2}+5{p}_{1∕2}){0}_{g}^{\ensuremath{-}}$ long-range molecular states in the asymptotic range of [$\ensuremath{-}12.5\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$, $\ensuremath{-}1.5\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$] below the dissociation limit. Using a Lu-Fano approach to analyze the data, we show that an improved LeRoy-Bernstein model has to be applied. This approach lets us determine the phase shift of the wave function at the dissociation limit of the ${0}_{g}^{\ensuremath{-}}$ series.