Photodissociation dynamics of O3− at 523 nm

Abstract The photodissociation dynamics of O 3 − at 523 nm have been studied using fast-ion-beam translational energy spectroscopy. Translational energy and angular distributions of coincident O − + O 2 products from the process O 3 − + hv → O − + O 2 were measured. O 3 − was generated by electron-impact in a pulsed beam from two precursors — neat O 2 and a seeded beam of O 3 . The observed photodissociation dynamics are very different in the two cases, indicating a great difference in internal excitation of ozonide in the two sources.