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Abstract
We present perturbations in photoassociation spectra of ultracold caesium. High-precision photoassociation spectra up to 54 cm−1 below the Cs (6S1/2)+Cs(6P1/2) asymptote revealed perturbations related to resonant coupling between electronic states of the same symmetry but belonging to different asymptotes. The perturbations, which are manifested as irregularities in vibrational level spacings, are most pronounced for the 0u+ state, but to some extent present in the 1g and 0g− states, which are also affected by predissociation. We have performed theoretical calculations of perturbations for all three states and found qualitative agreement with the experimental results.
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Schedule a callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
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