THE DOPPLER SPECTRA OF O(1D) FROM THE PHOTODISSOCIATION OF O2, NO2, AND N2O

The Doppler profiles of the O(1D) products from the photodissociation of O2 at 157.6 nm and NO2 and N2 O at 205.47 nm are detected by a resonance enhanced multiphoton ionization technique. The translation energy and angular distributions are deduced for the O(1D) atoms. Present results indicate that (a) O2 (B 3-SIGMA-u-) has a short dissociative lifetime when irradiated at 157.6 nm, (b) NO(2-PI) photofragment from NO2 at 205.47 nm is mostly vibrationally excited, and (c) most of the available energy is released as kinetic energy when N2O is photodissociated at 205.47 nm.