Subpromille Measurements and Calculations of CO (3–0) Overtone Line Intensities
Katarzyna Bielska, Aleksandra A. Kyuberis, Zachary Reed, Gang Li, Agata Cygan, R. Ciuryło, Erin M. Adkins, Lorenzo Lodi, Н. Ф. Зобов, Volker Ebert, Daniel Lisak, Joseph Hodges, Jonathan Tennyson, O. L. Polyansky
Abstract
Intensities of lines in the near-infrared second overtone band (3-0) of ^{12}C^{16}O are measured and calculated to an unprecedented degree of precision and accuracy. Agreement between theory and experiment to better than 1‰ is demonstrated by results from two laboratories involving two independent absorption- and dispersion-based cavity-enhanced techniques. Similarly, independent Fourier transform spectroscopy measurements of stronger lines in this band yield mutual agreement and consistency with theory at the 1‰ level. This set of highly accurate intensities can provide an intrinsic reference for reducing biases in future measurements of spectroscopic peak areas.