Fourier Transform Infrared Emission Spectroscopy of a New b3Π-a3Δ System of HfO

✍ Scribed by R.S. Ram; P.F. Bernath

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 848 KB
• Volume: 169
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1021

✦ Synopsis

The emission spectrum of (\mathrm{HfO}) has been investigated in the (400 \mathrm{~nm}) to (5 \mu \mathrm{m}) spectral region with a Fourier transform spectrometer. The bands were excited in a hafnium hollow cathode lamp in the presence of neon and a trace of oxygen. In the (6900-8000 \mathrm{~cm}^{-1}) region, four new sequences of bands were observed with the (0-0 Q) heads at (7060 \mathrm{~cm}^{-1}, 7355.4 \mathrm{~cm}^{-1}, 7376.8 \mathrm{~cm}^{-1}), and (7929.5 \mathrm{~cm}^{-1}). These bands have been identified as the ({ }^{3} \Pi_{0^{+}}{ }^{3} \Delta_{1},{ }^{3} \Pi_{0^{-}}{ }^{3} \Delta_{1},{ }^{3} \Pi_{1}{ }^{3} \Delta_{2}) and ({ }^{3} \mathrm{II}{2}-{ }^{3} \Delta{3}) subbands of the (b^{3} \Pi-a^{3} \Delta) transition. The rotational analysis of the (0-0) and (1-1) bands of each subband has been performed and the equilibrium rotational constants for each spin component of the (b^{3} \Pi I) and (a^{3} \Delta) states have been obtained. (c) 1995 Academic Press. Inc.