Journal
CHEMICAL PHYSICS LETTERS
Volume 660, Issue -, Pages 43-47Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2016.07.057
Keywords
Ab initio potential energy surface; Multipolar expansion; Rotational quenching; Ultracold collisions
Funding
- Science and Engineering Research Board (SERB), New Delhi (SERB Grant) [EMR/2014/000017]
- IIT Ropar
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Ultracold rotational deexcitation cross sections and rate coefficients have been computed for CO collision with proton using close-coupling method on the two-dimensional ground state potential energy surface computed at the MRCl/cc-pVTZ level of theory. State-to-state rate coefficients have been obtained for temperature range from 10(-5) K to 200 K. The system displays higher propensity with j' = 0 cross section magnitude closer to j' =1 state, and j' = 2 cross section closer to j' = 3 state, from initial j = 4 state. In ultracold region, the magnitude of cross section increases with the decrease in collision energy following Wigner's threshold law. (C) 2016 Elsevier B.V. All rights reserved.
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