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The reaction 2 O2(1Δg)→2 O2(3Σg−)+hν(6340 Å)has been studied using EPR detection of O2(1Δg). The light intensity depends on the square of the concentration of O2(1Δg) and is unaffected by total pressure variations and the addition of inert gas. The rate constant for light emission was found to be 5±1×10−23 cm3/molecule·sec. This appears to be consistent with the integrated absorption coefficient of ground-state oxygen.
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Falick et al. (1967) studied this question.
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