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>Spectra of the rare gas hydrides. IV. Three new bands of argon deuteride involving a lowhyphen;lying lsquo;lsquo;prsquo;rsquo; Rydberg state
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Spectra of the rare gas hydrides. IV. Three new bands of argon deuteride involving a lowhyphen;lying lsquo;lsquo;prsquo;rsquo; Rydberg state
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机译：Spectra of the rare gas hydrides. IV. Three new bands of argon deuteride involving a lowhyphen;lying lsquo;lsquo;prsquo;rsquo; Rydberg state
Three fairly strong emission bands of ArD at 6100, 6900, and 10thinsp;200 cmminus;1have been studied at high resolution. They show very different structures: the first exhibits onlyQhyphen;form branches, the secondP,R,O, andShyphen;form branches, and the thirdQ,S, andOhyphen;form branches. The rotational analysis of each of these bands is not trivial, mainly because the upper state of the first which proved to be also the lower state of the second and third is strongly affected byluncoupling lsqb;i.e., transition to Hundrsquo;s case (d)rsqb; and as a result the usual method of combination differences cannot be applied in their analysis. However, more sophisticated combination differences have been found between the three bands which lead to unambiguous assignments of rotational quantum numbers and thus to rotational constants. It was found that the upper state of the 6100 cmminus;1band can be most conveniently represented as ap(2Sgr;,2Pgr;) complex. This assumption, together with the theoretical selection rules for such a case, led to a full understanding of the structure of the three bands.
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