A statistical investigation of the rate constants for the H+ + HD reaction at temperatures of astrophysical interest
In: ISSN: 0021-9606, 2022
Online
academicJournal
Zugriff:
International audience ; The H+ + HD(v, j) reaction has been investigated in detail by means of a statistical quantum method. State-to-state cross sections and rate constants for transitions between reactants and rovibrational states HD(v′, j′) of the product arrangement with energies below 0.9 eV collision energy [that is, HD(v = 0, j = 0–11) and HD(v = 1, j = 0–6)] have been calculated. For the other product channel, D+ + H2(v′, j′), rovibrational states up to (v′ = 0, j′ = 9) have been considered for the calculation of the corresponding thermal rate. Present predictions are compared with previously reported theoretical and experimental rates. Finally, cooling functions for HD due to proton and atomic hydrogen collisions are computed in the low-density regime. We find that the much larger HD–H+ cooling function, as compared with that of HD–H, does not compensate for the low H+/H abundance ratio in astrophysical media so that HD cooling is dominated by HD–H (or HD–H2) collisions.
Titel: |
A statistical investigation of the rate constants for the H+ + HD reaction at temperatures of astrophysical interest
|
---|---|
Autor/in / Beteiligte Person: | González-Lezana, Tomás ; Hily-Blant, Pierre ; Faure, Alexandre ; Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) ; Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France |
Link: | |
Zeitschrift: | ISSN: 0021-9606, 2022 |
Veröffentlichung: | HAL CCSD ; American Institute of Physics, 2022 |
Medientyp: | academicJournal |
DOI: | 10.1063/5.0128598 |
Schlagwort: |
|
Sonstiges: |
|