Rotational Analysis of the LiHg 2²_3/2–X²⁺_1/2 (v = 0 v" = 0, 1, 2) Vibronic Bands

Authors: Li X.¹; Vidal C.R.²; Windholz L.¹

Source: Journal of Molecular Spectroscopy, Volume 198, Number 1, November 1999 , pp. 94-101(8)

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Abstract:

We present a complete analysis of the previously reported LiHg 2²_3/2–X² Sigma ⁺ excitation spectrum [X. Li, P. Pircher, D. Gruber, and L. Windholz, Chem. Phys. Lett. 263, 463 (1996)]. The v prime = 0 - v" = 0, 1, 2 vibronic bands are analyzed and the rotational transitions are identified. The assigned rotational transitions are initially fitted on a band-to-band basis. A global fit is performed afterwards for all the known vibronic transitions of the LiHg molecules. In the fit the ground state molecular constants are separated into spin–rotation coupling terms and Dunham-type coefficients. The obtained Dunham coefficients are used to derive the molecular potential for the ground electronic state using the inverted perturbation approach (IPA). The equilibrium bond length was found to be 2.9528(6) Å for the LiHg ground state. Copyright 1999 Academic Press.

Language: English

Document Type: Research article

DOI: http://dx.doi.org/10.1006/jmsp.1999.7936

Affiliations: 1: TU Graz, Institut für Experimentalphysik, Petersgasse 16, Graz, A-8010, Austria 2: Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, Garching bei Munich, D-85748, Germany

Publication date: 1999-11-01