SPECTROSCOPIC ANALYSIS OF PROTON-INDUCED FLUORESCENCE FROM CERIUM-DOPED YTTRIUM-ALUMINUM-GARNET

Citation
Jh. Fisher et al., SPECTROSCOPIC ANALYSIS OF PROTON-INDUCED FLUORESCENCE FROM CERIUM-DOPED YTTRIUM-ALUMINUM-GARNET, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 80-1, 1993, pp. 1207-1209
Citations number
7
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
ISSN journal
0168583X
Volume
80-1
Year of publication
1993
Part
2
Pages
1207 - 1209
Database
ISI
SICI code
0168-583X(1993)80-1:<1207:SAOPFF>2.0.ZU;2-1
Abstract
We have determined the effect of proton induced damage on relative sci ntillation efficiency for yttrium aluminum garnet doped with cerium (Y AG: Ce). The YAG: Ce phosphor samples were exposed to a 3 MeV proton b eam, and substrate temperature was limited to control heating damage. Real time in situ measurements of the fluorescence spectra permitted o bservation of the spectral characteristics of scintillator deteriorati on due to particle induced damage. Fluorescence from YAG: Ce is relati vely dim when compared to other rare earth oxysulfide compounds and th e light intensity drops rapidly with dose. Spectra from proton irradia ted YAG: Ce exhibit a broad fluorescence peak that is much wider than is typical in other yttrium and gadolinium phosphor compounds. The phy sical processes in YAG:Ce are very different from other bright-line ph osphors as shown by the large difference in the observed fluorescence peak width. Light intensity decreases with dose, following the Birks a nd Black empirical model.