we develop a self-consistent kinetic model to study the atomic and molecular processes in the microwave discharge plasma of N2-O2 mixtures. We focus on the NO A 2Σ+, B 2Π and C 2Π excited states in the mixture discharge, which were not included in our previous study. We find good agreement between the calculated numerical result of the NO A 2Σ+ density and the spectroscopically observed experimental result. Meanwhile, the B 2Π and C 2Π states are detected only when oxygen partial pressure is less than 3%. We discuss the de-excitation processes for NO B 2Π and C 2Π states in this low-pressure plasma. We also propose a de-excitation reaction by O2 X 3Σ−g for these levels, which can explain the observed spectral changing.
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