A multispectrum analysis of widths and shifts in the 2010–2260 cm −1 region of 12C 16O broadened by Helium at temperatures between 80 and 297 K

Abstract

Lorentz pressure-broadening and pressure-induced shift coefficients along with their temperature dependences have been determined for over forty P- and R-branch transitions in the fundamental band of 12C 16O broadened with helium. A total of nineteen spectra recorded at various temperatures (+24 to −194 °C) in the 2010–2260 cm −1 spectral region were analyzed simultaneously using a multispectrum nonlinear least squares fitting technique. The spectra were recorded with the McMath-Pierce Fourier transform spectrometer located at the National Solar Observatory on Kitt Peak. Present results are compared with similar measurements reported recently.