TY - JOUR
T1 - Diode laser spectroscopy of methyl chloride near 14 μm toward its detection in the stratosphere
AU - Betrencourt, M.
AU - Morillon-Chapey, M.
AU - Blanquet, G.
AU - Walrand, J.
N1 - Copyright 2008 Elsevier B.V., All rights reserved.
PY - 1988/4/1
Y1 - 1988/4/1
N2 - Detection of CHCl in the Earth's atmosphere by infrared techniques is a subject of current interest. The ν band, centered at 732 cm, has lines as strong as those of ν, centered at 2970 cm, and we show that they can be useful for a high-resolution detection. A complete study of the absorption spectrum of this molecule in the region 660-770 cm has been performed. On spectra recorded using a tunable diode laser spectrometer, with the spectral resolution limited by the Doppler width (0.0014 cm), we have assigned the ν band lines related to four isotopic species: CHCl, CHCl, CHCl, and CHCl. In addition, the hot band 2ν - ν for CHCl has been observed. The calculated molecular constants reproduce, for each band, the observed wavenumbers with a rms deviation of 6 × 10 cm. The ν band centers have been found to be 732.8421 and 727.0295 cm for the two main isotopic species, CHCl and CHCl, respectively. The feasibility of detection of methyl chloride in the stratosphere is discussed.
AB - Detection of CHCl in the Earth's atmosphere by infrared techniques is a subject of current interest. The ν band, centered at 732 cm, has lines as strong as those of ν, centered at 2970 cm, and we show that they can be useful for a high-resolution detection. A complete study of the absorption spectrum of this molecule in the region 660-770 cm has been performed. On spectra recorded using a tunable diode laser spectrometer, with the spectral resolution limited by the Doppler width (0.0014 cm), we have assigned the ν band lines related to four isotopic species: CHCl, CHCl, CHCl, and CHCl. In addition, the hot band 2ν - ν for CHCl has been observed. The calculated molecular constants reproduce, for each band, the observed wavenumbers with a rms deviation of 6 × 10 cm. The ν band centers have been found to be 732.8421 and 727.0295 cm for the two main isotopic species, CHCl and CHCl, respectively. The feasibility of detection of methyl chloride in the stratosphere is discussed.
UR - http://www.scopus.com/inward/record.url?scp=0000203822&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0000203822
SN - 0022-2852
VL - 128
SP - 433
EP - 443
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 2
ER -