Abstract
Experimental conditions under which the OI line λ5577 is emitted in a low-pressure glow discharge tube containing a mixture of oxygen and xenon gas is studied. It is clear from the experimental data that the excited xenon atom acts only upon the oxygen molecule and not upon the oxygen atom. On the basis of this study, it is proposed that the emission mechanism of OI line λ5577 should be classified into two processes: A. initial process, Xe″+O2(x3Σ-g)→Xe(1S0)+O(3P)+O(1S0)(Xe″ indicates a higher excited state of xenon) and B. main process, Xe*(3P2)+O2(a1Δg)→Xe(1S0)+O(3P)+O(1S0).This emission mechanism is different from the mechanism which uses the reaction of argon with a small amount of oxygen in a discharge tube.
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