What is it about?

Spectroscopy is the basis of remote sensing, used to gather atmospheric and astronomical data. The remote sensing in turn relies on accurate knowledge of the shapes of spectral lines. This paper presents a first time fully quantum calculation of the effect of collisions with oxygen molecules on the shape of one of carbon monoxide spectral lines.

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Why is it important?

Carbon monoxide is an important trace gas in the Earth's atmosphere. It is used in the study of air quality and climate forcing. Furthermore, while the CO molecule itself is not a greenhouse gas, it affects the concentration of methane and ozone, thus indirectly contributing to the climate change. The results presented in this paper constitute an important step towards developing a methodology for calculating spectroscopic parameters for other molecules of atmospheric importance.

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This page is a summary of: Ab initio quantum scattering calculations for the CO–O2 system and a new CO–O2 potential energy surface: O2 and air broadening of the R(0) line in CO, The Journal of Chemical Physics, November 2022, American Institute of Physics, DOI: 10.1063/5.0115654.
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