Collisional quenching of the B 2П state of NO

Abstract

The recombination of nitrogen and oxygen atoms gives rise to NOβ emission. The quenching of this emission at ∾ 3000 Å by H 2, NO 2 and H 2O is shown to occur by direct interactions of the quenching agent with NO( B 2П) v' = 0. Based on a radiative lifetime 3x10 -6 see for this state. the following rate constants fopr Quenching are derived: Q → CO 2 H 2 N 2O H 2O k Q (cm 3 mole -1 sec -1) 0·6 × 10 13 1·2 × 10 13 2·7 × 10 13 ≤ 30 × 10 13 T(°K) 196 196 196 298