Detailed and simplified kinetic schemes for high enthalpy air flows and their influence on catalycity studies

3 Collisional-radiative model for O atoms 4 3.1 Atomic model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Elementary rate coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2.1 Electron-impact excitation and deexcitation rate coefficients . . . . 7 3.2.2 Electron-impact ionization and three-body recombination rate coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2.3 Spontaneous emission . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2.4 Radiative and dielectronic recombinations . . . . . . . . . . . . . . 8 3.3 Master equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.4 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.4.1 General behaviour of time-dependent population densities . . . . . 9 3.4.2 General method to determine effective ionization and recombination rate coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11