Ortho-Para H2 Conversion by Proton Exchange at Low Temperature: An Accurate Quantum Mechanical Study - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2011

Ortho-Para H2 Conversion by Proton Exchange at Low Temperature: An Accurate Quantum Mechanical Study

Résumé

We report extensive, accurate fully quantum, time-independent calculations of cross sections at low collision energies, and rate coefficients at low temperatures for the H++H2(v=0,j)→H++H2(v=0,j') reaction. Different transitions are considered, especially the ortho-para conversion (j=1→j'=0) which is of key importance in astrophysics. This conversion process appears to be very efficient and dominant at low temperature, with a rate coefficient of 4.15×10-10cm3molecule-1s-1 at 10 K. The quantum mechanical results are also compared with statistical quantum predictions and the reaction is found to be statistical in the low temperature regime (T<100K).
Fichier principal
Vignette du fichier
honvault2011.pdf (1.18 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-00633371 , version 1 (13-01-2022)

Licence

Paternité

Identifiants

Citer

P. Honvault, M. Jorfi, T. González-Lezana, A. Faure, L. Pagani. Ortho-Para H2 Conversion by Proton Exchange at Low Temperature: An Accurate Quantum Mechanical Study. Physical Review Letters, 2011, 107 (1), pp.23201. ⟨10.1103/PHYSREVLETT.107.023201⟩. ⟨hal-00633371⟩
653 Consultations
66 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More