High-resolution study of the 2v₅ hybrid band of the CHD₃ molecule

O. N. Ulenikov, A. B. Malikova, S. Alanko, M. Koivusaari, R. Anttila

Research School of High-Energy Physics

Research output: Contribution to journal › Article

Abstract

The high-resolution infrared spectrum of CHD₃ has been measured on a Fourier transform spectrometer and analyzed in the region of the 2v₅ hybrid absorption band, 2450-2810 cm^-1. Anomalously small A₁-A₂ splittings of energy levels (J, K = 1, A_1,2) and anomalously large A₁-A₂ splittings of energy levels (J, K = 2, A_1,2) in the E-type subband were observed. Energy levels were also observed for J ≥ 16 splittings of (J, K = 4, A_1,2). These and other effects were described by strong Coriolis interactions between A₁-and E-type vibrational subbands. A corresponding Hamiltonian model is derived. It reproduces the initial experimental data (J^max = 22, K^max _a = 22) with mean accuracy 2.7 × 10^-4 cm^-1, which is not far from experimental uncertainties.

Original language	English
Pages (from-to)	175-194
Number of pages	20
Journal	Journal of Molecular Spectroscopy
Volume	179
Issue number	2
DOIs	https://doi.org/10.1006/jmsp.1996.0196
Publication status	Published - 1 Jan 1996

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ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry

Cite this

Ulenikov, O. N., Malikova, A. B., Alanko, S., Koivusaari, M., & Anttila, R. (1996). High-resolution study of the 2v₅ hybrid band of the CHD₃ molecule. Journal of Molecular Spectroscopy, 179(2), 175-194. https://doi.org/10.1006/jmsp.1996.0196

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title = "High-resolution study of the 2v5 hybrid band of the CHD3 molecule",

abstract = "The high-resolution infrared spectrum of CHD3 has been measured on a Fourier transform spectrometer and analyzed in the region of the 2v5 hybrid absorption band, 2450-2810 cm-1. Anomalously small A1-A2 splittings of energy levels (J, K = 1, A1,2) and anomalously large A1-A2 splittings of energy levels (J, K = 2, A1,2) in the E-type subband were observed. Energy levels were also observed for J ≥ 16 splittings of (J, K = 4, A1,2). These and other effects were described by strong Coriolis interactions between A1-and E-type vibrational subbands. A corresponding Hamiltonian model is derived. It reproduces the initial experimental data (Jmax = 22, Kmax a = 22) with mean accuracy 2.7 × 10-4 cm-1, which is not far from experimental uncertainties.",

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AU - Malikova, A. B.

AU - Alanko, S.

AU - Koivusaari, M.

AU - Anttila, R.

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N2 - The high-resolution infrared spectrum of CHD3 has been measured on a Fourier transform spectrometer and analyzed in the region of the 2v5 hybrid absorption band, 2450-2810 cm-1. Anomalously small A1-A2 splittings of energy levels (J, K = 1, A1,2) and anomalously large A1-A2 splittings of energy levels (J, K = 2, A1,2) in the E-type subband were observed. Energy levels were also observed for J ≥ 16 splittings of (J, K = 4, A1,2). These and other effects were described by strong Coriolis interactions between A1-and E-type vibrational subbands. A corresponding Hamiltonian model is derived. It reproduces the initial experimental data (Jmax = 22, Kmax a = 22) with mean accuracy 2.7 × 10-4 cm-1, which is not far from experimental uncertainties.

AB - The high-resolution infrared spectrum of CHD3 has been measured on a Fourier transform spectrometer and analyzed in the region of the 2v5 hybrid absorption band, 2450-2810 cm-1. Anomalously small A1-A2 splittings of energy levels (J, K = 1, A1,2) and anomalously large A1-A2 splittings of energy levels (J, K = 2, A1,2) in the E-type subband were observed. Energy levels were also observed for J ≥ 16 splittings of (J, K = 4, A1,2). These and other effects were described by strong Coriolis interactions between A1-and E-type vibrational subbands. A corresponding Hamiltonian model is derived. It reproduces the initial experimental data (Jmax = 22, Kmax a = 22) with mean accuracy 2.7 × 10-4 cm-1, which is not far from experimental uncertainties.

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10.1006/jmsp.1996.0196