Thumbnail
Access Restriction
Open

Author Saakes, A. ♦ Blasse, G.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ GADOLINIUM OXIDES ♦ CRYSTAL LATTICES ♦ LUMINESCENCE ♦ GERMANIUM OXIDES ♦ CRYSTAL DEFECTS ♦ DYSPROSIUM IONS ♦ EMISSION ♦ EUROPIUM IONS ♦ EXCITATION ♦ HOLES ♦ ION MOBILITY ♦ PROBABILITY ♦ SAMARIUM IONS ♦ TERBIUM IONS ♦ TRAPPING ♦ X RADIATION ♦ CHALCOGENIDES ♦ CHARGED PARTICLES ♦ CRYSTAL STRUCTURE ♦ ELECTROMAGNETIC RADIATION ♦ ENERGY-LEVEL TRANSITIONS ♦ GADOLINIUM COMPOUNDS ♦ GERMANIUM COMPOUNDS ♦ IONIZING RADIATIONS ♦ IONS ♦ MOBILITY ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ PARTICLE MOBILITY ♦ RADIATIONS ♦ RARE EARTH COMPOUNDS ♦ Ceramics, Cermets, & Refractories- Physical Properties ♦ Ceramics, Cermets, & Refractories- Structure & Phase Studies
Abstract The luminescence properties of Ln/sup 3+/-activated Gd/sub 2/GeO/sub 5/ are reported. The results show that the Ln/sup 3+/ ions are incorporated on both Gd/sup 3+/ sites in Gd/sub 2/GeO/sub 5/. The Gd/sup 3+/ ..-->.. Ln/sup 3+/ transfer probability increases in the sequence Sm/sup 3+/ less than or equal to Tb/sup 3+/ < Dy/sup 3+/ <Eu/sup 3+/. Upon x-ray excitation the sequence for the probability of transfer from the host lattice to the emitting center in Sm/sup 3+/, Eu/sup 3+/ < defect center < Gd/sup 3+/ trap < Tb/sup 3+/ less than or equal to Dy/sup 3+/. The excitation of the emitting centers is mainly due to the trapping of holes. An observed broad-band emission with a maximum at 445 nm is ascribed to a lattice defect.
Educational Use Research
Learning Resource Type Article
Publisher Date 1986-03-01
Publisher Place United States
Journal Mater. Res. Bull.
Volume Number 21
Issue Number 3
Organization Physical Lab., State Univ. Utrecht, P.O. Box 80.000, 3508 TA Utrecht


Open content in new tab

   Open content in new tab