The nonbonding interaction of boron atoms, in their ground 2s(2)2p P-2 and excited 2s(2)3s S-2 states, with H-2 and D-2 has been investigated through laser fluorescence excitation spectroscopy in a supersonic free jet. For these isotopomeric complexes, an asymmetric, unstructured feature is observed, with maximum intensity similar to 620 cm(-1) to the blue of the 3s S-2-2p P-2 atomic transition. The width of this feature is somewhat narrower for B-D-2 than for B-H-2. The fluorescence emission occurs in the same wavelength range as the boron atomic transition. These observations imply that the B(3s)-H-2 interaction is repulsive in the Franck-Condon region. No evidence for chemical reaction on the excited BH2 potential energy surface was found. The observed formation of these complexes in the supersonic beam also suggests that there is a significant barrier to formation of the stable BH2 molecule from B(2p)+H-2. These spectra have been interpreted with the help of ab initio calculations of the B(2p,3s)-H-2 interactions and the bend-stretch energies of the complex, both reported in the preceding paper [M. H. Alexander and M. Yang, J. Chem. Phys. 103, 7956 (1995)]. From comparison with these calculations, our spectra can be assigned as electronic excitation from the lowest bend-stretch level of the B(2p)-H-2/D-2 complex to a repulsive region of the electronically excited potential energy surface. Spectral simulations based on the theoretical treatment of this nonbonding interaction reproduce quite well the observed spectra.