The collision-induced non-adiabatic transitions from the f0g+ state of the iodine ion-pair second tier

Abstract

Non-adiabatic transitions from the f0g+ state of the iodine ion-pair (IP) second tier induced by collision with iodine ground state molecules have been studied for the first time. The only I2(f0g+,vf,Jf→I2(X)F0u+,vF,JF) transition has been observed. No transitions between the states of the first and second tiers have been found. The dependences of the I2(f0g+,vf,Jf→I2(X)F0u+,vF,JF) transition rate constants on the vibrational vf=8–19, vF, rotational Jf≈55,85,105, JF quantum numbers, energy gaps, as well as their correlations with Franck–Condon factors (FCFs) of the initial and final levels have been studied. The principal features of the collision-induced non-adiabatic transitions in the first and second tiers are very similar.