The Resonance Fluorescence Spectrum of Cl2 in the Vacuum Ultraviolet
Abstract
The resonance fluorescence spectrum of Cl2 first observed by Rao and Venkateswarlu in 1962, has been photographed at high resolution and analyzed. The assignments of the lines have been revised and new resonance series have been observed. It is shown that the ground state of Cl2, dissociates into Cl atoms with no potential hill and that the dissociation energy isD0 = 19 997.28 cm−1.Vibrational and rotational constants and the R.K.R. curve of the ground state of Cl2 have been determined. The long-range portion of the ground state potential of Cl2 has been examined and shown to be consistent with the predictions of theory and measurements from the B3Π0 potential.
Résumé
Le spectre de fluorescence par résonance de Cl2, observé pour la première fois par Rao et Venkateswarlu en 1962, a été photographié avec une grande résolution et analysé. On a révisé l'identification des raies et observé de nouvelles séries de résonance. On montre que Cl2 dans son état fondamental peut se dissocier en atomes de Cl sans que le potentiel passe par un maximum, et que l'énergie de dissociation est D0 = 19 997.28 cm−1. On a déterminé les constantes de vibration et de rotation, ainsi que la courbe R.K.R. de l'état fondamental de Cl2. La portion à longue portée du potentiel de l'état fondamental de Cl2 a été examinée, et on a montré qu'elle était compatible avec les prédictions de la théorie et les mesures du potentiel B3Π0. [Traduit par le journal]
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Published In
Canadian Journal of Physics
Volume 53 • Number 19 • October 1975
Pages: 1965 - 1975
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Version of record online: 11 February 2011
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A. E. Douglas and A. R. Hoy. 1975. The Resonance Fluorescence Spectrum of Cl2 in the Vacuum Ultraviolet. Canadian Journal of Physics.
53(19): 1965-1975. https://doi.org/10.1139/p75-246
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