https://doi.org/10.1007/s100530170235
A multispectrum fitting procedure to deduce molecular line parameters: Application to the 3-0 band of 12C16O
1
Laboratoire de Physique Moléculaire et Applications,
CNRS et Université Pierre et Marie Curie, case 76, tour 13, 4
place Jussieu, 75252 Paris Cedex 05, France
2
Laboratoire de Photophysique Moléculaire, CNRS et
Université Paris-Sud, bâtiment 350, 91405 Orsay Cedex, France
Corresponding author: a vdana@ccr.jussieu.fr
Received:
21
September
2000
Revised:
15
January
2001
Published online: 15 April 2001
To deduce accurate infrared molecular line parameters (positions at
zero pressure, pressure-shifting and pressure-broadening coefficients,
collisional narrowing coefficients, and intensities) from rovibrational
spectra, an automatic method based upon a multispectrum fitting procedure
has been set up, able to treat simultaneously several laboratory Fourier
transform spectra. A validation of this method, using absorption spectra of
the 3-0 vibrational band of CO around 6 350 cm-1, already
used to measure line intensities and self-broadening coefficients, is
presented, and the advantages of the method are pointed out. The
self-collisional narrowing of CO was observed and determined for the first
time in Fourier transform spectra: 
cm-1 atm-1
at about 296 K.
PACS: 33.20.Ea – Infrared spectra / 33.70.Fd – Absolute and relative line and band intensities / 33.70.Jg – Line and band widths, shapes, and shifts
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
