Analysis of 2ν2, ν1, and ν3 of H2Se |
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Authors: | James R. Gillis T.H. Edwards |
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Affiliation: | Department of Physics, Michigan State University, East Lansing, Michigan 48824 USA |
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Abstract: | We have run the high-resolution infrared absorption spectrum of 2ν2, ν1, and ν3 of H2Se in the region 5.2 to 3.8 μm. We have identified and fitted approximately 520 transitions in 2ν2, 930 transitions in ν1, and 620 transitions in ν3. Included are transitions from the isotopic species containing selenium isotopes 82, 80, 78, 77, and 76. Using Typke's rotational Hamiltonian, we analyzed all isotopic species simultaneously. Ground-state constants were determined from a simultaneous least-squares fit of 879 distinct ground-state combination differences formed from our data and 109 microwave transitions. Upper-state constants were obtained from least-squares fits of our spectral lines analyzing 2ν2 as a single noninteracting band and analyzing the Coriolis interacting bands ν1 and ν3 simultaneously, keeping the ground-state constants fixed. |
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