title: Study with Analytical Equations of Absorption Spectra Containing Interference Dips in Fluoride Glasses Doped with Cr(3.).
abstract: The optical absorption of Cr(3+)-doped fluoride glasses has been investigated. The lowest energy absorption band (4)A2 → (4)T2 shows distinct interference dips due to spin-orbit coupling between (4)T2, (2)E and (2)T1 excited states. The dips were analyzed using an analytical method proposed by Bussière et al. ( J. Phys. Chem. A 2003 , 107 , 1258 ) based on coupled potential energy surfaces. Then a theoretical crystal-field analysis based on the Racah tensor algebraic method was carried on Cr(3+) ions occupying octahedral site symmetry in the fluoride glasses. Satisfactory correlations were obtained between the experimental and calculated energy levels. The fitting of the interference dips also provided a measure of the spin-orbit coupling constant for Cr(3+) in fluoride glasses, intermediate between the theoretical value calculated for a fluoride crystal and the value deduced from Racah parameters.
authors.affiliation: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine , Av. O. Messiaen, 72085 Le Mans cedex 09, France.|Laboratoire de Chimie Inorganique, Faculté des Sciences de Sfax, Université de Sfax , BP 1171, 3000, Sfax, Tunisia.
authors.forename: O
authors.initials: O
authors.lastname: Maalej
authors.affiliation: Laboratoire de Physique Appliquée, Groupe de Physique des Matériaux Luminescents, Faculté des Sciences de Sfax, Université de Sfax , BP 1171, 3000, Sfax, Tunisia.
authors.forename: O
authors.initials: O
authors.lastname: Taktak
authors.affiliation: Institut des Molécules et Matériaux du Mans, UMR CNRS 6283, Université du Maine , Av. O. Messiaen, 72085 Le Mans cedex 09, France.
authors.forename: B
authors.initials: B
authors.lastname: Boulard
authors.affiliation: Laboratoire de Physique Appliquée, Groupe de Physique des Matériaux Luminescents, Faculté des Sciences de Sfax, Université de Sfax , BP 1171, 3000, Sfax, Tunisia.
authors.forename: S
authors.initials: S
authors.lastname: Kammoun