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

  title={Absolute measurements of state-to-state rotational energy transfer between CO and 
 at interstellar temperatures},
  author={Hamza Labiad and Martin Fournier and Laura A. Mertens and Alexandre Faure and David Carty and Thierry Stoecklin and Piotr Jankowski and Krzysztof Szalewicz and S{\'e}bastien D. Le Picard and Ian R. Sims},
  journal={Physical Review A},
Hamza Labiad, Martin Fournier, Laura A. Mertens, 2 Alexandre Faure, David Carty, Thierry Stoecklin, Piotr Jankowski, Krzysztof Szalewicz, Sébastien D. Le Picard, and Ian R. Sims ∗ Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) UMR 6251, F-35000 Rennes, France Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States Université de Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France Durham University, Joint Quantum… 



Rotational energy transfer in collisions between CO(X 1Sigma+, v= 2 , J = 0, 1, 4, and 6) and He at temperatures from 294 to 15 K.

Infrared-vacuum ultraviolet double resonance experiments have been implemented in the ultracold environment provided by a Cinetique de Reaction en Ecoulement Supersonique Uniforme apparatus and are shown to be in remarkably good agreement with those obtained in ab initio scattering calculations by Dalgarno and co-workers.

A combined experimental and theoretical study of rotational energy transfer in collisions between NO(X 2Π1/2, v=3,J) and He, Ar and N2 at temperatures down to 7 K

Infrared-ultraviolet double resonance (IRUVDR) experiments have been implemented in the ultra-cold environment provided by a CRESU (Cinetique de Reaction en Ecoulement Supersonique Uniforme)

Inelastic collisions in para-H2: translation-rotation state-to-state rate coefficients and cross sections at low temperature and energy.

We report an experimental determination of the k(00-->02) rate coefficient for inelastic H(2):H(2) collisions in the temperature range from 2 to 110 K based on Raman spectroscopy data in supersonic


Rate coefficients for state-to-state rotational transitions in CO induced by both para- and ortho-H2 collisions are presented. The results were obtained using the close-coupling method and the


Carbon monoxide is one of the most abundant components in many interstellar media and modeling its spectra requires knowledge of rate coefficients for the rotational (de-)excitation by collision with

Comparative experimental and theoretical study of the rotational excitation of CO by collision with ortho- and para-D2 molecules.

The agreement between theory and experiment is found to be very good for both the bound state energies of the ortho-D2- CO complexes and for the inelastic scattering cross-sections showing that the free rotation of two rigid rotors is a very good model of the D2-CO system in this low collision energy domain.

The rate of the F + H2 reaction at very low temperatures.

Direct experimental measurements of the rate of this reaction down to a temperature of 11 K are reported, in remarkable agreement with state-of-the-art quantum reactive scattering calculations, to allow a stronger link to be made between observations of interstellar HF and the abundance of the most common interstellar molecule, H2, and hence a more accurate estimation of the total mass of astronomical objects.

A comprehensive experimental and theoretical study of H2-CO spectra.

Details concerning the development of the surfaces and the process of spectral line assignment are provided, and some transitions for paraH2-CO that have not been assigned earlier are assigned, as well as experimental investigations of the orthoH 2-CO complex using microwave spectroscopy.

All-dimensional H2-CO potential: Validation with fully quantum second virial coefficients.

This work uses a new high-accuracy all-dimensional potential to compute the cross second virial coefficient B12(T) between molecular hydrogen and carbon monoxide and finds that the reduced-dimensionality potential obtained by averaging over the rovibrational motion of the monomers gives results that are a good approximation to those obtained when flexibility is fully taken into account.