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Updated: Jun 6, 2026

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
Published on: August 19, 2021
Determination of line strengths by Fourier-transform spectroscopy
Abstract:
A rigorous test of the photometric accuracy of commercial high-resolution Fourier transform spectrometers has been made by measuring line strengths in the pure rotational spectrum of carbon monoxide. Measurements have been made with a Bruker IPS 120 HR spectrometer (transitions: J″ = 7 . . . 23) and a Bomen DA3.002 spectrometer (J″ = 27 . . . 35). A least-squares fit of individual data sets and the combined data gave permanent electric dipole moments in the range 0.1091-0.1101 D and quadratic Herman-Wallis factors in the range -0.188 to -0.229 × 10(-3), in good agreement with literature values within the overall uncertainty. Sources of systematic errors in the Fourier-transform spectrometer and in the algorithms used to reduce the data are discussed in detail. The experimental results show that such errors affected the retrieved line strengths by less than 1%.
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