Systematic analysis of the Fourier transform spectrum of CH<sub>3</sub>OH between 400 and 950 cm期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Systematic analysis of the Fourier transform spectrum of CH₃OH between 400 and 950 cm

Authors:	Joã o Carlos Silos Moraes,Franco Strumia

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

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.

Keywords:	33.20.Ea 33.20.Vq
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