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Long-range ion-pair rubidium molecule

We have performed high resolution absorption measurements in the neighborhood of the Rb second principal series doublet (5s1/2-6p1/2, 3/2), where an interesting satellite band appears. The interpretation of this satellite band was possible by means of the ab initio potential curves calculations. We propose that this long-range ion-pair molecule may be used for making ultracold Rb2 molecule in the ground electronic state.

rubidium; satellite band; ultracold molecules

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