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Isotope Substitution in Near Local Mode H2X Molecules: The ν1 and ν3 Bands of D2Se

✍ Scribed by O.N. Ulenikov; G.A. Onopenko; N.E. Tyabaeva; H. Bürger; W. Jerzembeck

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
462 KB
Volume
197
Category
Article
ISSN
0022-2852

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✦ Synopsis

The high-resolution (0.0027 cm Ϫ1 ) Fourier transform spectra of the D 2 Se molecule as 80 Se monoisotopic and natural material were recorded for the first time in the 1500 -1900 cm Ϫ1 region where the 1 and 3 vibration-rotation bands are located. Because accurate information about the rotational structures of different vibrational states was still lacking, the isotopic relations between rotational, centrifugal distortion, resonance interaction, etc., parameters of the H 2 Se and D 2 Se species were derived and successfully used for the construction of a synthetic spectrum for the 1 and 3 bands. As a result, lines of the recorded spectrum were assigned, and band centers, rotational, centrifugal distortion, and resonance interaction parameters for the (100) and ( 001) states of the species D 2 M Se, M ϭ 76, 77, 78, 80, and 82, were determined. The obtained sets of parameters reproduce values of the vibration-rotation energies with a "mean" accuracy of 0.00007 cm Ϫ1 for the D 2 80 Se, and a slightly worse accuracy for other Se isotopic species.

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