The 39K2 2 3Σg+ state: Observation and analysis - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Physics Année : 2007

The 39K2 2 3Σg+ state: Observation and analysis

Résumé

The 39K2 2 3Σg+ state has been observed by perturbation-facilitated infrared-infrared double resonance spectroscopy and two-photon excitation. Resolved fluorescence spectra into the a 3Σu+ state have been recorded. The observed vibrational levels have been assigned as the v=23-25, 27, 28, 31-33, 38-45, 47, and 53 levels by comparing the observed and calculated spectra of the 2 3Σg+-->a 3Σu+ transitions. Molecular constants have been obtained using a global fitting procedure with a comprehensive set of experimental data. Fine and hyperfine splittings have been resolved in the excitation spectra. Perturbations between the 2 3Σg+ and 2 3Πg states were observed. The hyperfine patterns of the 2 3Σg+ levels are strongly affected by the perturbation. The perturbation-free and weakly perturbed levels follow the case bβS coupling scheme, while the perturbed levels follow case bβJ coupling. A Fermi contact constant, bF=65+/-10 MHz, has been obtained. Intensity anomalies of rotational lines appeared both in the 2 3Σg+~2 3Πg<--b 3Πu excitation spectra and in the 2 3Σg+~2 3Πg-->a 3Σu+ resolved fluorescence spectra. These intensity anomalies can be explained in terms of a quantum-mechanical interference effect.
Fichier non déposé

Dates et versions

hal-00908240 , version 1 (22-11-2013)

Identifiants

Citer

Dan Li, Feng Xie, Li Li, Vladimir B. Sovkov, Valery S. Ivanov, et al.. The 39K2 2 3Σg+ state: Observation and analysis. Journal of Chemical Physics, 2007, 126, pp.4314. ⟨10.1063/1.2730804⟩. ⟨hal-00908240⟩
50 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More