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外文期刊>journal of chemical physics
>Quenching of the lowesthyphen;lying metastable excimer of argon by N2and effects of rsquo;rsquo;threehyphen;bodyrsquo;rsquo; Ar(1s) quenching on the yield of Ar2(3Sgr;+u)
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Quenching of the lowesthyphen;lying metastable excimer of argon by N2and effects of rsquo;rsquo;threehyphen;bodyrsquo;rsquo; Ar(1s) quenching on the yield of Ar2(3Sgr;+u)
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机译：Quenching of the lowesthyphen;lying metastable excimer of argon by N2and effects of rsquo;rsquo;threehyphen;bodyrsquo;rsquo; Ar(1s) quenching on the yield of Ar2(3Sgr;+u)
Fast absorption spectrophotometry has been used to monitor the growth and decay of the Ar2(3Sgr;+u) excimer species at 992 nm in argonndash;nitrogen mixtures following passage of single pulses of a high current, high energy electron beam. The rate constant for electronic energy transfer to N2is equal to 2.24 (plusmn;0.08)10minus;12cm3moleculeminus;1sminus;1at 294 K. The yield of Ar2(3Sgr;+u) is found to be markedly enhanced relative to predictions based on the total quenching efficiencies of N2for the Ar(1s) atoms. This enhancement is attributed to rsquo;rsquo;threehyphen;bodyrsquo;rsquo; quenching by N2, i.e., vibrational and rotational relaxation of dissociative excimer molecules formed by twohyphen;body Ar(1s)+Ar(1S0) combinations.
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