title: Luminescence properties of Ce(3+)-doped LiGdP(4)O(12) upon vacuum-ultraviolet and x-ray excitation.
abstract: Luminescent-kinetic studies for LiY(0.9)Ce(0.1)P(4)O(12), LiGd(0.9)Ce(0.1)P(4)O(12) and NaGd(0.9)Ce(0.1)P(4)O(12) phosphates which were prepared by the melt solution technique have been performed using synchrotron radiation excitation within 3-12.4 eV energy range and x-ray radiation at T = 10-300 K. The [Formula: see text] transfer at 10 K and bidirectional [Formula: see text] mechanisms of energy transfer at 300 K have been revealed based on the analysis of the excitation spectra and decay kinetic measurements of Ce(3+) luminescence. The participation of the Gd sublattice in the energy migration process to the Ce(3+) centers causes the appearance of a slow component in the decay kinetics of the x-ray-excited luminescence pulse. The luminescence efficiency of LiY(0.9)Ce(0.1)P(4)O(12), LiGd(0.9)Ce(0.1)P(4)O(12) and NaGd(0.9)Ce(0.1)P(4)O(12) upon x-ray excitation at room temperature is discussed.
authors.affiliation: Physics Department, Ivan Franko National University of Lviv, 8 Kyryla i Mefodiya Street, 79005 Lviv, Ukraine.
authors.forename: T
authors.initials: T
authors.lastname: Shalapska
authors.forename: G
authors.initials: G
authors.lastname: Stryganyuk
authors.forename: P
authors.initials: P
authors.lastname: Demchenko
authors.forename: A
authors.initials: A
authors.lastname: Voloshinovskii
authors.forename: P
authors.initials: P
authors.lastname: Dorenbos