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E. N. Moskvitina, Yu. Ya. Kuzyakov

Investigation of the absorption electronic spectrum of the monobromide hafnium molecule in the region 550–800 nm

Abstract

The absorption electronic spectra of HfBr in the region550–800 nm have been obtained and investigated using the intracavity laser method. Molecules of HfBr have been created in plasma formed by a pulse electric discharge in vapors of a mixture of hafnium tetra bromide with nitrogen and hydrogen or ammonium. The discharge tube with the mixture was placed in the cavity of a dye laser. The registration of spectra has been performed by means of the diffraction spectrograph (resolution power 240000). Twenty new bands contained partly resolved rotational structure were found in the HfBr spectrum as a result of the high sensitivity of the intracavity method. Bands in the spectrum of HfBr were assigned to 2Δ 3/2–X 2Δ 3/2 transition by analogy with the spectrum of HfCl. Analysis of these bands were performed and the molecular constants unknown before were determined.
Key words: HfBr, intercavity laser spectroscopy, vibration analysis, molecular constants.
Moscow University Chemistry Bulletin.
2015, Vol. 56, No. 5, P. 307
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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