The effect of translational energy on collision-induced dissociation of highly excited NO2 on MgO(100)

Collision-induced dissociation of highly excited NO2 (i.e., mixed 2B2/2A1 molecular eigenstates just below D0) impinging on MgO(100) surfaces has been studied as a function of NO2 internal excitation at an incident translational energy of 4400 cm−1 by using state-selective NO detection. NO internal energy distributions as well as the average energy transferred per activating collision have been obtained. The results, in particular the NO [2Π1/2]/[2Π3/2] population ratios, indicate the presence of exit-channel interactions with the surface that are dependent on collision energy.