title: Optical studies of Eu3+ doped oxyfluoroborate glass.
abstract: Rare earth doped oxyfluoroborate glasses have been prepared with different concentration of Eu3+. The UV-Vis/NIR optical absorption, laser induced fluorescence and photoacoustic spectra of Eu3+ in this host have been studied. Different optical parameters such as oscillator strength, Judd-Ofelt intensity parameter, stimulated emission cross-section, transition probability, branching ratio and radiative lifetime, etc. have been calculated. Lifetime of the 5D0 level at various concentrations of Eu3+ have been used to explain the concentration dependent fluorescence quenching. The mechanism of quenching was found to be dipole-dipole. Energy transfer have also been studied from Eu3+ to Pr3+ in sample with 1 mol% (Eu3+) + 1 mol% Pr3+.
authors.affiliation: Department of Physics, Banaras Hindu University, Varanasi 221005, India.
authors.forename: K K
authors.initials: KK
authors.lastname: Mahato
authors.forename: S B
authors.initials: SB
authors.lastname: Rai
authors.forename: Anita
authors.initials: A
authors.lastname: Rai
mesh_terms: D000162:Acoustics; D004305:Dose-Response Relationship, Drug; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry* / Q000494:pharmacology; D005898:Glass; D008027:Light; D008956:Models, Chemical; D009991:Oscillometry; D011221:Praseodymium / Q000032:analysis / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry / Q000379:methods*; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013997:Time Factors; D014466:Ultraviolet Rays
chemical_list: D005063:Europium; D011221:Praseodymium