ANISOTROPY AND ENERGY DISPOSAL IN THE 193-NM N2O PHOTODISSOCIATION MEASURED BY VUV LASER-INDUCED FLUORESCENCE OF O(D(1))

Laser-induced fluorescence near 115 nm has been used to measure the Doppler profile of the O(1D) product of 193-nm N2O photolysis. The anisotropy of product recoil vectors is characterized by the parameter beta = 0.50 +/- 0.05. The measured velocity distribution can be used to calculate a distribution of recoil energies that is in reasonable agreement with that reported recently by Felder, Haas, and Huber; an average of 27.3 kcal/mol is deposited into translation, leaving almost-equal-to 37 kcal/mol for the internal excitation of the N2 fragment.