Systematic analysis of the Fourier transform spectrum of CH3OH between 400 and 950 cm |
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Authors: | Joã o Carlos Silos Moraes,Franco Strumia |
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Affiliation: | a Departamento de Física e Química, UNESP, 15.385-000 Ilha Solteira-SP, Brazil b Dipartimento di Fisica “Enrico Fermi” dell’Università di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy c Physikalisch-Chemisches Institut der Justus-Liebig-Universität, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany |
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Abstract: | We have investigated a high-resolution Fourier transform (FT) absorption spectrum of the 13CH3OH isotopomer of methanol from 400 to 950 cm−1 with the “Ritz” program. We present the assignments of 7160 transitions, 3021 of which belong to A-symmetry, and 4139 to E-symmetry. These transitions occur between states labeled by K quantum numbers up to 14, and by torsional quantum numbers n up to 4. The “Ritz” program evaluated the energies of the 4684 involved levels with an accuracy of the order of 10−4 cm−1. All of the assigned lines correspond to transitions involving torsionally excited levels within the ground small-amplitude vibrational state. |
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Keywords: | 33.20.Ea 33.20.Vq |
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