Time-resolved fluorescence studies of the A 2Σ +(υ′=1) state of nitric oxide: Lifetimes and collisional deactivation rates

Abstract

Time-resolved fluorescence spectroscopy has been utilized to determine lifetimes and collisional deactivation rates for the A 2Σ +(υ′=1) state of nitric oxide. Individual rotational levels within the υ′=1 state were populated. No rotational dependence was observed. The lifetime of the υ′=1 state was measured to be 196±3 ns. Quenching rates from the υ′=1 state were found to be (1.4±0.2)×10 −10 and (2.7±0.2)×10 −13 cm 3 s −1 for O 2 and N 2 respectively. The vibrational cross-over rate from υ′=1 to υ′=0 was measured to be 9.5×10 −14 cm 3 s −1 for N 2.