Rare gas–halogen atom interaction potentials from crossed molecular beams experiments: I(2P3/2)+Kr, Xe(1S)

Angular distributions of I(2P3/2) scattered off Kr and Xe(1S0) in the thermal energy range have been measured in crossed molecular beams experiments. The interaction potentials for two relevant states (X 1/2 and I 3/2) for each of the systems are obtained by using an approximate elastic scattering analysis, which neglects nonadiabatic coupling, as previously done for other rare gas–halogen systems. The I–Xe (X 1/2) potential (ε = 0.69 kcal/mol, rm = 4.30 Å) and, to some extent, I–Kr (X 1/2) potential (ε = 0.55 kcal/mol, rm = 4.05 Å) shows a slightly more attractive interaction than the interaction potentials of Xe–Xe and Xe–Kr, but the I–Xe (I 3/2) potential (ε = 0.48 kcal/mol, rm = 4.60 Å)) and the I–Kr (I 3/2) potential (ε = 0.36 kcal/mol, rm = 4.32 Å) present shallower ε’s, a larger rm, and stronger repulsive walls than the corresponding rare gas pair potentials. The results obtained from this and previous investigations are reviewed.