Collision-Induced E(0g+)−D(0u+) State-to-State Energy Transfer in I₂

Abstract

Electronic energy transfer in the E(0g+)−D(0u+) system of I₂ is investigated in an experiment, where single rovibrational quantum states are prepared, single collision conditions prevail, and the final states have been determined from dispersed fluorescence. In I2∗(E)−X​​ (X=Ar, N2, O2) the collisional decay is found to be governed by minimum energy transfer. With (X=I2) an anomalous behaviour is found for the initially prepared E, ν=8, J=56 level, which is tentatively ascribed to vibrational excitation of the collision partner.