ANALYSIS OF $2\nu_{2}, \nu_{1}$, AND $\nu_{3}$ OF $H_{2}Se$
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Date
1980
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Ohio State University
Abstract
In a similar manner to that employed in our analysis of the corresponding bands of $H_{2}S$, we have analyzed $2\nu_{2}, \nu_{1}$, and $\nu_{3}$ of $H_{2}Se$ in the 5.2 to 3.8 $\mu m$ region. We have identified and fitted approximately 520 transitions in $2\nu_{2}, 930$ transitions in $\nu_{1}$, and 620 transitions in $\nu_{3}$. Included ate transitions from the isotopic species containing selenium isotopes 82, 80, 78, 77, and 76. Using Typke’s rotational $Hamiltonian,^{1}$ we analyzed all isotopic species simultaneously. Ground state constants were determined from a simultaneous least squares fit of 879 distinct ground state combination differences from our data and 109 microwave $transitions.^{2}$ Upper state constants were obtained from least squares fits of our spectral lines analyzing $2\nu_{2}$ as a single non-interacting band and analyzing the Coriolis interacting bands $\nu_{1}$ and $\nu_{3}$ simultaneously, keeping the ground state constants fixed.
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$^{1}$V. Typke, J. Mol. Spectrosc. 63, 170 (1976). $^{2}$P. Helminger and F.C. Delucia, J. Mol. Spectrosc. 58, 375 (1975).
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