High-Resolution Analysis of the ν2, 2ν2, ν1, and ν3 Bands of H280Se

✍ Scribed by J.M. Flaud; C. Camypeyret; H. Burger; H. Willner

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 599 KB
• Volume: 161
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1224

✦ Synopsis

High-resolution Fourier transform spectra of monoisotopic (\mathrm{H}{2}{ }^{80} \mathrm{Se}) have been recorded in the 10 - and (4.3-\mu \mathrm{m}) spectral regions where the (\nu{2}) and the (2 \nu_{2}, \nu_{1}), and (\nu_{3}) bands of this molecule absorb, respectively. The ((0 \mid 0)) rotational levels were least-squares fitted using a Watson-type Hamiltonian, whereas for the ({(020),(100),(001)}) interacting states it proved necessary to consider the strong Coriolis interaction coupling the ((100)) and ((001)) rotational levels as well as the weak Coriolis interaction coupling the ((020)) and ((001)) levels. In this way, all the experimental levels were calculated to within their experimental uncertainty and a precise set of vibrational energies and rotational and coupling constants was obtained for the ( 010(),\left(\begin{array}{lll}0 & 20\end{array}\right),(100)), and ((001)) vibrational states of (\mathrm{H}{2}{ }^{\mathrm{BO}} \mathrm{Se}) with the band centers, (\boldsymbol{v}{0}\left(\nu_{2}\right)=1034.171498(10) \mathrm{cm}^{-1}, \nu_{0}\left(2 v_{2}\right)=) (2059.96709(24) \mathrm{cm}^{-1}, v_{0}\left(v_{1}\right)=2344.362750(29) \mathrm{cm}^{-1}), and (v_{0}\left(v_{3}\right)=2357.653848(31) \mathrm{cm}^{-1}). (i) 1993 Academic Press, Inc