title: Optical studies of Eu3+ ions doped in tellurite glass.
abstract: Absorption and fluorescence spectra of Eu3+ ions doped in a tellurite glass have been recorded and analysed. Judd-Ofelt analysis has been done in order to calculate the different optical parameters such as oscillator strength, Judd-Ofelt intensity parameters, stimulated emission cross-section, transition probability, branching ratio, radiative lifetime, etc. Lifetime measurements of the 5D0 level as a function of Eu3+ concentration have been used to explore the concentration quenching process. The mechanism of quenching is found to be of a dipole-dipole type.
authors.affiliation: Department of Physics, Banaras Hindu University, Varanasi, India.
authors.forename: Akshaya
authors.initials: A
authors.lastname: Kumar
authors.forename: D K
authors.initials: DK
authors.lastname: Rai
authors.forename: S B
authors.initials: SB
authors.lastname: Rai
mesh_terms: D005063:Europium / Q000737:chemistry*; D005898:Glass; D007477:Ions; D007700:Kinetics; D013050:Spectrometry, Fluorescence / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D013691:Tellurium / Q000737:chemistry*
chemical_list: D007477:Ions; D005063:Europium; C026660:tellurous acid; D013691:Tellurium