Overall and state-to-state quenching of atomic oxygen O(2p33p 3PJ) by collisions with He and N2.

[Display omitted] • Oxygen atoms were detected by vacuum UV emission after two-photon excitation. • Time-resolved vacuum UV emission was recorded at varying pressures of He and N 2. • The kinetic analysis of the time profiles was made by the integrated profiles method. • The quenching rate coefficients of O(3p 3P) by He and N 2 have been determined. • State-to-state (3p 3P → 3 s 3S) quenching rate coefficients have been determined. Electronically excited atomic oxygen O (2p 3 3 p 3 P J) was prepared by ultraviolet (225.6 nm) two-photon excitation from the ground state 2 p 4 3 P 2. The 2p 3 3 p 3 P J state transfers to the 2p 3 3 s 3 S state via the infrared transition at 845 nm and/or by collisions with ambient gases. The vacuum ultraviolet (VUV) emission at 130 nm via the transition 2p 3 3 s 3 S → 2 p 4 3 P J was detected, and the time-resolved VUV emission at varying pressures of He and N 2 was recorded. The kinetic analysis made by the integrated profiles method has given the rate coefficients not only for the overall quenching of the 2p 3 3 p 3 P J state but also for the state-to-state quenching 2p 3 3 p 3 P J → 2p 3 3 s 3 S by He and N 2. [ABSTRACT FROM AUTHOR]