Vibration-rotation spectra of [sup 13]C-containing acetylene: The [nu][sub 1]/[nu][sub 2] + 2[nu][sub 5] Fermi dyad

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Journal of Molecular Spectroscopy; (United States)

DOI:https://doi.org/10.1006/jmsp.1994.1068· OSTI ID:7280242

Di Lonardo, G; Ferracuti, P; Fusina, L; Venuti, E ^[1]

---

1. Univ. di Bologna (Italy). Dept. di Chimica Fisica e Inorganica

High-resolution vibration-rotation spectra of [sup 13]C[sub 2]H[sub 2] have been recorded in the wavenumber regions 1100--1240, 1730--1810, 2550--2700, and 3130--3280 cm[sup [minus]1] at Doppler- or pressure-limited resolution. In these spectral ranges bands involving the [nu][sub 1] and [nu][sub 2] stretchings and the bending-stretching combination levels with [upsilon][sub 2] = 1, [upsilon][sub 4] = 1, [upsilon][sub 5] [le] 2 have been analyzed. The main purpose of the analysis was the treatment of the Fermi resonance occurring between the [nu][sub 1]([Sigma][sub g][sup +]) and the [nu][sub 2] + 2[nu][sub 5]([Sigma][sub g][sup +]) levels, detected as [nu][sub 1][l arrow][nu][sub 5] and [nu][sub 2] + 2[nu][sub 5][l arrow][nu][sub 5] hot bands in the 4-[mu]m region. The global analysis of all the observed transitions provided a set of 20 molecular parameters which fully characterize the stretching and bending-stretching combination states. The vibrational coupling terms which describe the Fermi resonance are also computed with high accuracy.

• OSTI ID: 7280242
• Journal Information: Journal of Molecular Spectroscopy; (United States), Journal Name: Journal of Molecular Spectroscopy; (United States) Vol. 164:1; ISSN JMOSA3; ISSN 0022-2852
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ACETYLENE
ALKYNES
CARBON 13
CARBON ISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
HYDROCARBONS
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
NUCLEI
ORGANIC COMPOUNDS
SPECTRA
STABLE ISOTOPES