OPTICAL-ABSORPTION AND THERMOLUMINESCENCE STUDIES IN CAF2-TM CRYSTALSIRRADIATED AT ROOM-TEMPERATURE

Authors
LAKSHMANAN AR TIWARI SS
Citation
Ar. Lakshmanan et Ss. Tiwari, OPTICAL-ABSORPTION AND THERMOLUMINESCENCE STUDIES IN CAF2-TM CRYSTALSIRRADIATED AT ROOM-TEMPERATURE, Radiation protection dosimetry, 47(1-4), 1993, pp. 243-246
Citations number
NO
Categorie Soggetti
Radiology,Nuclear Medicine & Medical Imaging","Nuclear Sciences & Tecnology
Journal title
Radiation protection dosimetry → ACNP
ISSN journal
01448420
Volume
47
Issue
1-4
Year of publication
1993
Pages
243 - 246
Database
ISI
SICI code
0144-8420(1993)47:1-4<243:OATSIC>2.0.ZU;2-3
Abstract
Optical absorption (OA), thermoluminescence (TL), phototransfer and ph olobleaching studies on CaF2:Tm single crystals irradiated with gamma rays at 25-degrees-C indicate that the TL peaks at 160-degrees-C, 180- degrees-C and 480-degrees-C are due to hole activation (giving rise to OA bands near 310 nm) and subsequent recombination with Tm2+ (giving rise to OA bands near 400 and 600 nm) resulting in TM3+ emission. Howe ver, the major TL peak at 280-degrees-C could not be associated with a ny OA band. Results indicate that this peak could arise because of ele ctron activation, recombination with holes and subsequent resonant ene rgy transfer to TM3+ ions.