Radiative lifetimes of HBr+ and DBr+ (2Π1/2, v =0, 1) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Physics Année : 1994

Radiative lifetimes of HBr+ and DBr+ (2Π1/2, v =0, 1)

Résumé

Radiative lifetimes of HBr+ and DBr+(2Π1/2, v=0, 1) have been determined using the monitor ion technique in a triple cell ICR spectrometer with Fourier transform detection. The experimental lifetimes corresponding to the vibrational transition v=1→0 are 10.2±1 ms and 56+12−11 ms for HBr+ and DBr+, respectively. The lifetimes calculated by a coupled electron pair approximation (CEPA) method similar to the method used previously for HF+ and HCl+ are 8.8 ms for HBr+ and 35.8 ms for DBr+, in rather good agreement with the experimental results. A comparison with previous experimental and theoretical results on hydrogen halides shows a shortening of the lifetime between the neutrals and the corresponding ions and a lengthening with isotopic substitution (H by D) as well as with substitution of F by Cl or by Br. The lifetimes corresponding to spin–orbit relaxation are very long 852+621−282 ms for HBr+ and 965+546−323 ms for DBr+. They can be considered as equal within the quite large experimental uncertainty on the contribution of collisional deactivation.
Fichier non déposé

Dates et versions

hal-04211717 , version 1 (19-09-2023)

Identifiants

Citer

S. Jullien, Joël Lemaire, S. Fenistein, M. Heninger, G. Mauclaire, et al.. Radiative lifetimes of HBr+ and DBr+ (2Π1/2, v =0, 1). Journal of Chemical Physics, 1994, 101 (1), pp.265-270. ⟨10.1063/1.468179⟩. ⟨hal-04211717⟩
8 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More