Vector properties of O(~3P) and O(~1D) in OH photodissociation: Near-threshold resonance, neighboring resonance, and above-threshold behavior

摘要

Theoretical analysis is presented for the vector properties of the oxygen atom produced from the photodissociation of OH at energies from near the threshold to O(~3P) to above the threshold to O(~1D). The vector properties of O(~3P_j, j = 0,1,2) (angular distributions and alignment parameters) change rapidly across multichannel resonances near the dissociation threshold to O(~3P). The vector properties near the close-lying Lorentzian resonances depend highly on the geometrical factors for the electronic transitions, corresponding to different final total angular momentum quantum numbers, and change rapidly between the resonances. At energies above the dissociation threshold to O(~1D), quantum interference between the two direct dissociation pathways gives rise to highly oscillator pattern of the vector properties of O(~1D).