Calculs numériques de facteurs de Franck-Condon et effets isotopiques: perturbation de H2C1Πuet prédissociation de H2D1Πu
- 1 January 1971
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 20 (3) , 527-539
- https://doi.org/10.1080/00268977100100491
Abstract
On utilise l'opérateur de couplage entre le mouvement rotationnel et le mouvement électronique sous une forme condensée, plus explicite que celle donnée par van Vleck en 1951. On calcule numériquement les facteurs de Franck-Condon appropriés, et, pour obtenir les éléments de matrice en valeur absolue, on utilise l'hypothèse de précession pure. L'accord obtenu avec les mesures expérimentales de déplacement de niveaux est très bon. En ce qui concerne la prédissociation, pour laquelle les informations expérimentales sont fragmentaires, on prédit l'effet de J, l'effet de v et les effets isotopiques. A condensed form of the coupling operator between rotational and electronic motion is given, which is more explicit than that given by van Vleck in 1951. The appropriate Franck-Condon factors are calculated numerically, and for obtaining the absolute values of the matrix elements the hypothesis of pure precession is used. The agreement obtained with experimental data on level shifts is very good. For predissociation, where the experimental data are fragmentary, the J effect, the v effect and isotope effects are predicted.Keywords
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