| Domaine : |
 |
|
|
| Titre : |
|
Fragmentation branching ratios of highly excited hydrocarbon molecules CnH and their cations CnH+ (n<5) |
|
| Auteur(s) : |
|
T. Tuna1, M. Chabot1, T. Pino2, P. Désesquelles3, A. Lepadellec4, G. .Martinet1, M. Barat5, B. Lucas5, F. Mezdari6, L. Montagnon4, N.T. Van-Oanh7, L. Lavergne1, A. Lachaize1, Y. Carpentier2, K. Béroff5 |
|
| Laboratoire : |
|
|
|
| Résumé : |
|
We have measured fragmentation branching ratios of neutral CnH and CnH+ cations produced in high velocity (4.5 a.u) collisions between incident CnH+ cations and helium atoms. Electron capture gives rise to excited neutral species CnH and electronic excitation to excited cations CnH+. Thanks to a dedicated set-up, based on coincident detection of all fragments, the dissociation of the neutral and cationic parents were recorded separately and in a complete way. For the fragmentation of CnH, the H-loss channel is found to be dominant, as already observed by other authors. By contrast, the H-loss and C-loss channels equally dominate the two-fragment break up of CnH+ species. For these cations, we provide the first fragmentation data (n > 2). Results are also discussed in the context of astrochemistry. |
|
Langue du texte
intégral : |
|
Anglais |
|
Date de production,
écriture : |
|
12/2007 |
|
|
| Journal : |
|
The Journal of Chemical Physics |
|
| Audience : |
|
non spécifiée |
|
| Type de publication : |
|
Articles dans des revues avec comité de lecture |
|
| Date de publication : |
|
28/03/2008 |
|
| Volume : |
|
128 |
|
| Page, identifiant, ... : |
|
124312 |
|
|
| Classification : |
|
34-50 Gb; 95-30 Ft |
|
|
Récupérer au format
