Molecular square dancing in CO-CO collisions

Science
Zhong-Fa SunDavid H Parker

Abstract

Knowledge of rotational energy transfer (RET) involving carbon monoxide (CO) molecules is crucial for the interpretation of astrophysical data. As of now, our nearly perfect understanding of atom-molecule scattering shows that RET usually occurs by only a simple "bump" between partners. To advance molecular dynamics to the next step in complexity, we studied molecule-molecule scattering in great detail for collision between two CO molecules. Using advanced imaging methods and quasi-classical and fully quantum theory, we found that a synchronous movement can occur during CO-CO collisions, whereby a bump is followed by a move similar to a "do-si-do" in square dancing. This resulted in little angular deflection but high RET to both partners, a very unusual combination. The associated conditions suggest that this process can occur in other molecule-molecule systems.

Associated Datasets

Aug 3, 2020·Jérôme LoreauZhongFa Sun

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Citations

Nov 17, 2020·The Journal of Physical Chemistry. a·Bikramaditya MandalDmitri Babikov
Jul 18, 2020·Science·Zhong-Fa SunDavid H Parker
Dec 23, 2020·The Journal of Physical Chemistry Letters·Cornelia G HeidMark Brouard

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