Laser Spectroscopy of the (010)2Σ(+), 2Σ(−)−(000)2Σ+ Parallel Bands in the Ã2Π-X̃2Σ+ System of CaOH

✍ Scribed by J.A. Coxon; M.G. Li; P.I. Presunka

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 514 KB
• Volume: 164
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1060

✦ Synopsis

The forbidden (\dot{A}(010)^{2} \Sigma^{(+)},{ }^{2} \Sigma^{(-)}-\dot{X}(000)^{2} \Sigma^{+})parallel bands of (\mathrm{CaOH}), which gain transition strength through vibronic mixing between different electronic states, have been observed via laserinduced fluorescence. The fundamental bending frequency (\nu_{2}) and the Renner-Teller parameter (\epsilon \omega_{2}) in the (\hat{A}^{2}) II state are determined as (361.346(1)) and (-36.4040(7) \mathrm{cm}^{-1}), respectively. The first excited bending vibrational level ((010)) of the (\dot{X}^{2} \Sigma^{+})state has been observed via resolved LIF. The fundamental frequency (\nu_{2}) and the (l)-type doubling constant (q_{\mathrm{t}}) are determined as (352.898(6)) and (-7.086(87) \times 10^{-4} \mathrm{~cm}^{-1}), respectively. (c) 1994 Academic Press. Inc.