Ion-pair state spectroscopy of HgCl

Fluorescence excitation spectra of HgCl produced and cooled in a corona-excited supersonic jet discharge are presented. The dominant feature between ≈ 368 and 267 nm is an extensive vibrationally and isotopically resolved band system which is assigned to the B 2 Σ + (ν′) ← X 2 Σ + (ν″ = 0, 1, and 2)...

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Bibliographic Details
Published in:Canadian journal of chemistry 1993-10, Vol.71 (10), p.1615-1621
Main Authors: Bascal, H.A, Jordan, K.J, Lipson, R.H
Format: Article
Language:English
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Summary:Fluorescence excitation spectra of HgCl produced and cooled in a corona-excited supersonic jet discharge are presented. The dominant feature between ≈ 368 and 267 nm is an extensive vibrationally and isotopically resolved band system which is assigned to the B 2 Σ + (ν′) ← X 2 Σ + (ν″ = 0, 1, and 2) valence-to-ion-pair state transition of the radical. Transition wavenumbers for vibrational bands with 75 ≥ ν′ ≥ 21 and 2 ≥ ν″ ≥ 0 were measured, and B-state Dunham parameters were derived which are valid between 75 ≥ ν′ ≥ 0. The equilibrium bondlength for the B-state was determined to be 2.960(2) Å by Franck-Condon calculations. B-X Franck-Condon factors are tabulated which are expected to help in the interpretation of HgCl 2 photodissociation and HgCl laser spectra.
ISSN:0008-4042
1480-3291
DOI:10.1139/v93-201