The Cd 5 3P0 State in the Cadmium-photosensitized Reaction and the Quenching of the Resonance Radiation at 326.1 nm by Nitrogen, Carbon Monoxide, and Carbon Dioxide

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<jats:title>Abstract</jats:title> <jats:p>The emission of the resonance line at 326.1 nm (5 3P1→5 1S0) and the absorptions of Cd(3P0) at 340.4 nm (5 3D1←5 3P0) and of Cd(3P1) at 346.6 nm (5 3D2←5 3P1) have been measured as functions of the pressure of foreign gases at 250°C. At the pressures higher than 1 Torr of any rare gas, an equilibrium was established between 5 3P1 and 5 3P0 states. The efficiency of nitrogen in producing the 5 3P0 state from the 5 3P1 state was found to be more than 103 times those of rare gases. The quenching efficiencies of nitrogen, carbon monoxide, and carbon dioxide for the resonance radiation at 326.1 nm were also measured by using argon as the diluent gas. The halfquenching pressures obtained were 73±3, 0.47±0.01, and 0.096±0.003 Torr for nitrogen, carbon monoxide, and carbon dioxide respectively.</jats:p>

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