Fourier transform emission spectroscopy and ab initio calculations on WO》.pdfVIP

Journal of Molecular Spectroscopy 256 (2009) 216–227 Contents lists available at ScienceDirect Journal of Molecular Spectroscopy journal homepage: /locate/jms Fourier transform emission spectroscopy and ab initio calculations on WO Ram S. Ram a,*, J. Liévin b, Peter F. Bernath a,c,d a Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA b Université Libre de Bruxelles, Service de Chimie quantique et Photophysique, CP 160/09, Av. F. D. Roosevelt 50, Bruxelles, Belgium c Department of Chemistry, University of Waterloo, Waterloo, Ont., Canada N2L 3G1 d Department of Chemistry, University of York, Heslington, York YO10 5DD, UK a r t i c l e i n f o a b s t r a c t Article history: Emission spectra of WO have been observed in the 4000–35 000 cm1 region using a Fourier transform Received 13 February 2009 spectrometer. Molecules were produced by exciting a mixture of WCl6 vapor and He in a microwave dis- In revised form 15 April 2009 charge lamp. A 3R state has been assigned as the ground state of WO based on a rotational analysis of Available online 3 May 2009 the observed bands and ab initio calculations. After rotational analysis, a majority of strong bands have been classified into three groups. Most of the transitions belonging to the first group have an X = 0+ state Keywords: as the lower state while the bands in the second group have an X00 = 1 state as the lower state. These two Emission spectroscopy +