Abstract
We report the calculation of the same-species elastic scatteringproperties for the ultracold rubidium–rubidium (85Rb–85Rb)system and the results are compared with other theoretical andexperimental results in detail. We present an improved potential fortriplet ground states of the Rb2 molecule, and calculate thescattering lengths at and the effective range re using WKB andNumerov methods for two rubidium-85 collisions in the triplet state.Also, we investigate the convergence of these scattering properties,i.e. the dependence on core radius and K0 parameter usingquantum defect theory and the analytic calculations of scatteringlength obtained by Szmytkowski. In addition, we present evaporativecooling and other results that include phase shift and cross section atzero energy limit.
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