Translational spectroscopy studies of the photodissociation dynamics of O-4

Sherwood, C. R.; Hanold, K. A.; Garner, M. C.; Strong, K. M.; Continetti, R. E.
December 1996
Journal of Chemical Physics;12/22/1996, Vol. 105 Issue 24, p10803
Academic Journal
An investigation of the photodissociation dynamics of the dimer anion O[SUP-,SUB4] at 523.6, 349.0, and 261.8 nm is reported. Product translational energy and angular distributions have been obtained using photofragment translational spectroscopy in a fast ion beam. At all wavelengths photodissociation (O[SUP-,SUB4] + hν → O[SUB2] + O[SUP-,SUB2]) is observed to proceed via a rapid parallel electronic transition, with the photofragment angular distribution strongly peaked along the laser electric vector. The lowest energy photodissociation channel produces O[SUB2](a[SUP1] Δ[SUBg]) and ground state O[SUP-,SUB2](X[SUP2]Π[SUBg]), indicating that O[SUP-,SUB4] is a doublet anion. The partitioning of energy in the dissociation reveals a complicated wavelength dependence.


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