Photodissociation dynamics of O3− at 523 nm

The photodissociation dynamics of O3− at 523 nm have been studied using fast-ion-beam translational energy spectroscopy. Translational energy and angular distributions of coincident O− + O2 products from the process O3− + hv → O− + O2 were measured. O3− was generated by electron-impact in a pulsed beam from two precursors — neat O2 and a seeded beam of O3. The observed photodissociation dynamics are very different in the two cases, indicating a great difference in internal excitation of ozonide in the two sources.