The far-infrared spectrum of 12C2HD

Gianfranco Di Lonardo (1) , Adriana Predoi-Cross (2) , Luciano Fusina (3) , Michel Herman (4)

1 Dipartimento di Chimica Fisica e Inorganica [Bologna]
2 Department of Physics and Astronomy [Lethbridge]
3 Dpt. Chimica Fisica e Inorganica
4 Service de Chimie Quantique et Photophysique

The infrared spectrum of ¹²C₂HD has been studied using synchrotron radiation at the far-infrared beamline, Canadian Light Source, Saskatoon, Canada. The spectra were recorded at a resolution of 0.00096 cm^-1 in the 60 to 360 cm^-1 range using a Bruker IFS125 Fourier transform spectrometer. Altogether, 821 vibration rotation lines were observed and assigned to P(J), Q(J) and R(J) transitions of the ν₅ ← ν₄ difference band and associated hot bands with J" up to 35 and (ν₄ + ν₅) up to 3. These new transitions were analyzed together with 4518 transitions involving bending states with (ν₄ + ν₅) up to 3 available in the literature. The spectroscopic parameters obtained from the fit reproduce 4909 transitions with a standard deviation of 0.00028 cm-1. The ν₅ ← ν₄ bands of the ¹³CH¹²CD and ¹²CH¹³CD molecules were also detected and analyzed.

Mots clés: Physical Sciences

Gianfranco Di Lonardo, Adriana Predoi-Cross, Luciano Fusina, Michel Herman. The far-infrared spectrum of 12C2HD. Molecular Physics, 2010, pp.1. ⟨10.1080/00268976.2010.536170⟩. ⟨hal-00644706⟩