Abstract
We show through close-coupled quantum-scattering calculations that the cross section for fine-structure-changing collisions between excited $^{2}$${\mathit{P}}_{3/2}$ and ground $^{2}$${\mathit{S}}_{1/2}$ A atoms of the same species, where A=Rb or Cs, is very sensitive to the molecular potentials and spin-orbit matrix elements of the alkali-metal-dimer species. Spectroscopic studies of these species are needed to extract accurate parameters. New high-resolution photoassociation spectroscopy of trapped atoms could be used for this purpose.
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