The branching ratio for the production of O(1D) and O(3P) from the deactivation of O(1S) by O2 has been measured. The fraction going to O(1D) was found to be 0.31±0.07, the remainder going to O(3P). The quenching of O(1S) by O2 does not lead to O2(b 1Σ+g) formation, as occurs in the O(1D) –O2 interaction.
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Slanger et al. (1978) studied this question.