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Absolute measurements of state-to-state rotational energy transfer between CO and H₂ at interstellar temperatures

Labiad, Hamza and Fournier, Martin and Mertens, Laura A. and Faure, Alexandre and Carty, David and Stoecklin, Thierry and Jankowski, Piotr and Szalewicz, Krzysztof and Le Picard, Sébastien D. and Sims, Ian R. (2022) Absolute measurements of state-to-state rotational energy transfer between CO and H₂ at interstellar temperatures. Physical Review A, 105 (2). Art. No. L020802. ISSN 2469-9926. doi:10.1103/physreva.105.l020802.

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Experimental measurements and theoretical calculations of state-to-state rate coefficients for rotational energy transfer of CO in collision with H₂ are reported at the very low temperatures prevailing in dense interstellar clouds (5–20 K). Detailed agreement between quantum state-selected experiments performed in cold supersonic flows using time-resolved infrared–vacuum-ultraviolet double-resonance spectroscopy and close-coupling quantum scattering calculations confirms the validity of the calculations for collisions between the two most abundant molecules in the interstellar medium.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Fournier, Martin0000-0002-8771-3913
Mertens, Laura A.0000-0003-4166-3954
Faure, Alexandre0000-0001-7199-2535
Carty, David0000-0002-1598-9021
Stoecklin, Thierry0000-0002-1349-8106
Jankowski, Piotr0000-0002-2023-5849
Szalewicz, Krzysztof0000-0002-2947-4694
Le Picard, Sébastien D.0000-0002-3753-4431
Sims, Ian R.0000-0001-7870-1585
Additional Information:© 2022 American Physical Society. (Received 1 October 2020; accepted 21 December 2021; published 23 February 2022) This work was supported by the Agence Nationale de la Recherche (ANR-HYDRIDES), Contract No. ANR-12-BS05-0011-01, by the Région de Bretagne and the French National Programme “Physique et Chimie du Milieu Interstellaire” (PCMI) of CNRS/INSU with INC/INP cofunded by CEA and CNES. D.C. would like to thank the Université de Rennes 1 for support via the Visiting Professor programme. L.M. thanks Rennes Metropole for a mobility grant, and the Office for Science and Technology of the Embassy of France in the United States for a Chateaubriand Fellowship. This work was also supported in part by the National Science Foundation under Grant No. CHE-1900551. P.J. acknowledges support from the National Science Centre of Poland under Grant No. 2017/25/B/ST4/01300.
Funding AgencyGrant Number
Agence Nationale pour la Recherche (ANR)ANR-12-BS05-0011-01
Région de BretagneUNSPECIFIED
Physique et Chimie du Milieu Interstellaire (PCMI)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Commissariat a l'Energie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Université de Rennes 1UNSPECIFIED
Rennes MetropoleUNSPECIFIED
Office for Science and Technology of the Embassy of FranceUNSPECIFIED
National Science Centre (Poland)2017/25/B/ST4/01300
Issue or Number:2
Record Number:CaltechAUTHORS:20220223-919267000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113542
Deposited By: George Porter
Deposited On:24 Feb 2022 17:17
Last Modified:24 Feb 2022 17:17

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