Measurements of the nitric oxide ion vibrational absorption coefficient and vibrational transfer to N2*

The NO+(v) absorption coefficient and quenching of NO+ vibration in the v=1 and v=2 states by N2 have been experimentally determined. Integrated absorption coefficients corrected for a thermal equilibrium distribution are: S1u(1–2 P 5) =430 cm−2 atm−1 and S1u(2–3 R2) =653 cm−2 atm−1. Quenching of NO+(v) by N2 at 297 °K was found to give rates of k=2.5×10−12 cm−3 sec−1 for NO+(v=2) and k=3.0 ×10−12 cm3 sec−1 for NO+(v=1). An estimate of 3 ×10−13 cm3 sec−1 was found for quenching of NO+(v=2) by NO at 297 °K.