HICKSON, Kevin; LOISON, Jean-Christophe; BOURGALAIS, Jérémy; CAPRON, Michael; LE PICARD, Sébastien D.; GOULAY, Fabien; WAKELAM, Valentine

doi:10.1088/0004-637X/812/2/107

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

HICKSON, Kevin

LOISON, Jean-Christophe

BOURGALAIS, Jérémy
Institut de Physique de Rennes [IPR]

Langue

Article de revue

Ce document a été publié dans

The Astrophysical Journal. 2015-10, vol. 812, n° 2, p. 107

American Astronomical Society

Résumé en anglais

A continuous supersonic flow reactor has been used to measure rate constants for the C(3P) + NH3 reaction over the temperature range 50–296 K. C(3P) atoms were created by the pulsed laser photolysis of CBr4. The kinetics of the title reaction were followed directly by vacuum ultra-violet laser induced fluorescence of C(3P) loss and through H(2S) formation. The experiments show unambiguously that the reaction is rapid at 296 K, becoming faster at lower temperatures, reaching a value of (1.8 ± 0.2) × 10‑10 cm3 molecule‑1 s‑1 at 50 K. As this reaction is not currently included in astrochemical networks, its influence on interstellar nitrogen hydride abundances is tested through a dense cloud model including gas–grain interactions. In particular, the effect of the ortho-to-para ratio of H2, which plays a crucial role in interstellar NH3 synthesis, is examined.< Réduire

Mots clés en anglais

astrochemistry

ISM: abundances

Métadonnées

Licence d’utilisation du document

The C(3P) + NH3 Reaction in Interstellar Chemistry. II. Low Temperature Rate Constants and Modeling of NH, NH2, and NH3 Abundances in Dense Interstellar Clouds

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche