Photodissociation Dynamics of AlO at 193 nm using Time-Sliced Ion Velocity Imaging^†

The photodissociation dynamics of AlO at 193 nm is studied using time-sliced ion velocity mapping. Two dissociation channels are found through the speed and angular distributions of aluminum ions: one is one-photon dissociation of the neutral AlO to generate Al( ^2 P _ \rmu )+O( ^3 P _ \rmg ), and the other is two-photon ionization and then dissociation of AlO ^+ to generate Al ^+ ( ^1 S _ \rmg )+O( ^3 P _ \rmg ). Each dissociation channel includes the contribution of AlO in the vibrational states v = 0-2. The anisotropy parameter of the neutral dissociation channel is more dependent on the vibration state of AlO than the ion dissociation channel.