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Alkaline-earth-like atoms possess singlet and triplet manifolds coupled through the ground state. The weak and hence narrow linewidth intercombination transition can provide a powerful probe of singlet-singlet magneto-optic trap (MOT) dynamics. We demonstrate in situ probing of an ytterbium MOT and discuss how cloud position, size, and temperature can be determined.
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Loftus et al. (2000) studied this question.
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