Photoassociation inside an optical dipole trap: absolute rate   coefficients and Franck-Condon factors
  We present quantitative measurements of the photoassociation of cesium molecules inside a far-detuned optical dipole trap. A model of the trap depletion dynamics is derived which allows to extract absolute photoassociation rate coefficients for the initial single-photon photoassociation step from measured trap-loss spectra. The sensitivity of this approach is demonstrated by measuring the Franck-Condon modulation of the weak photoassociation transitions into the low vibrational levels of the outer well of the 0g- state that correlates to the 6s+6p3/2 asymptote. The measurements are compared to theoretical predictions. In a magneto-optical trap these transitions have previously only been observed indirectly through ionization of ground state molecules. 
R. Wester, S. D. Kraft, M. Mudrich, M. U. Staudt, J. Lange, N.   Vanhaecke, O. Dulieu, M. Weidemuller