Photoassociation to the 2(1)Sigma(g)(+) state in ultracold 85Rb2 in the   presence of a shape resonance
  We report the first observation of photoassociation to the 2(1)Sigma(g)(+) state of 85Rb2 . We have observed two vibrational levels (v'=98, 99) below the 5s1/2+5p1/2 atomic limit and eleven vibrational levels (v'=102-112) above it. The photoassociation---and subsequent spontaneous emission---occur predominantly between 15 and 20 Bohr in a region of internuclear distance best described as a transition between Hund's case (a) and Hund's case (c) coupling. The presence of a g-wave shape resonance in the collision of two ground-state atoms affects the photoassociation rate and lineshape of the J'= 3 and 5 rotational levels. 
M. A. Bellos, R. Carollo, D. Rahmlow, J. Banerjee, E. E. Eyler, P. L.   Gould, and W. C. Stwalley
physics.atom-ph