Electronic excitations and energy transfer in A(2)SiO(5)-Ce (A = Y, Lu, Gd) and Sc2SiO5 single crystals

Authors
Ivanov, VY Petrov, VL Pustovarov, VA Shulgin, BV Vorobjov, VV Zinevich, EG Zinin, EI
Citation
Vy. Ivanov et al., Electronic excitations and energy transfer in A(2)SiO(5)-Ce (A = Y, Lu, Gd) and Sc2SiO5 single crystals, NUCL INST A, 470(1-2), 2001, pp. 358-362
Citations number
12
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
470
Issue
1-2
Year of publication
2001
Pages
358 - 362
Database
ISI
SICI code
0168-9002(20010901)470:1-2<358:EEAETI>2.0.ZU;2-P
Abstract
The time-resolved emission spectra (2-6 eV), reflection and luminescence ex citation spectra (4.5-35 eV) as well as the kinetics of luminescence have b een studied for single crystals of silicates A(2)SiO(5)-CC (A = Y, Gd, Lu) and Se2SiO5 at 5.8 and 300 K using synchrotron radiation of X-ray (storage ring VEPP-3) or selective Vacuum ultraviolet (storage ring DORIS) range. Th e spectral and decay parameters of the impurity and intrinsic luminescence are determined. The photon multiplication effect was found for all compound s for energy E > 15 eV (E > 2.5E(g)). The role of electron-hole and exciton mechanisms of energy transfer in the silicates and their dependence on tem perature are discussed, (C) 2001 Elsevier Science B.V. All rights reserved.