Coupled singlet-triplet analysis of two-color cold-atom photoassociation spectra - art. no. 043407

We describe a method that is well suited to analysis of the bound states of the alkali-metal dimers near their dissociation limit. The method combines inverse perturbation theory, coupled-channel bound-state theory, and the a ccumulated phase method to treat the short-range part of the molecular pote ntials. We apply this method to analyze the bound-state energies measured i n a two-color photoassociation experiment in an ultracold Rb-85 gas. This a nalysis yields information on the interactions between ultracold Rb-85 atom s that is important to the understanding of ultracold Rb collisions and Bos e-Einstein condensation.