Abstract
The deactivation processes of Cd(5 3P2) by H2 and D2 were studied by employing pulsed laser techniques. The cross sections for the intramultiplet relaxation to produce Cd(5 3P1) and Cd(5 3P0) were determined as follows: Cd(5 3P2)+H2→Cd(5 3P1)+H2; 6.3, Cd(5 3P2)+H2→Cd(5 3P0)+H2; 1.0, Cd(5 3P2)+D2→Cd(5 3P1)+D2; 4.4, Cd(5 3P2)+D2→Cd(5 3P0)+D2; 0.9, in units of 10−16 cm2 at 630 K. The cross sections for the overall deactivation of Cd(5 3P2) by H2 and D2 were determined to be 9.8×10−16 cm2 and 6.9×10−16 cm2, respectively. These values are compared with the calculated results based on a semiclassical curve crossing mechanism. It is suggested that electronic-to-rotational energy transfer without sharp resonances plays an important role in the deactivation of Cd(5 3P2).
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