Kinetic study of excited diatomic molecules of krypton and xenon.

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Excited diatomic molecules of krypton and xenon in 13Σu+ states, Kr2* and Xe2*, were produced by irradiating krypton and xenon in the presence of an excess of argon with short electron-beam pulses. The kinetic behaviors of Kr2* and Xe2* (monitored by near-IR absorption spectrophotometry) are explained quantitatively in terms of mechanisms involving three-body association and radiative decay. The rate constants were found to be (6.5±0.8)×10−33 cm6s−1 for Kr*+Kr+Ar→Kr2*+Ar and (1.6±0.3)×10−32 cm6 s−1 for Xe*+Xe+Ar→Xe2*+Ar. The rate constants for the quenching reactions of Kr2* were determined for Xe, H2, O2, N2, CO, and NO.
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