| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9845857 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 5 Pages |
Abstract
Good storage properties after irradiation have been observed in doubly rare-earth-doped LiRESiO4:Ce3+,Sm3+, RE=Y,Lu powders. We present strong arguments that in the studied materials Ce3+ ions play a role of hole trapping and Sm3+ ions of electron trapping centres. Additionally, oxygen vacancies are also involved in electron trapping, however they can be removed by appropriate thermal treatment. During thermal stimulation of irradiated LiRESiO4:Ce3+,Sm3+, RE=Y,Lu an electron from Sm2+ is released into the conduction band formed by SiO4 and further migrates to Ce4+ centers. This causes the TL peak at 340 K in LiLuSiO4:Ce3+,Sm3+ and at 400 K in LiYSiO4:Ce3+,Sm3+ upon heating rate of 1 Ks. Very fast and efficient photo-stimulated luminescence (PSL) have been observed upon stimulation with an IR laser (λ=830nm). The presented materials can be utilized in Image Plates for X-ray or neutron position sensitive detection.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Andrei V. Sidorenko, Adrie J.J. Bos, Pieter Dorenbos, Carel W.E. van Eijk, Andrée Kahn-Harari, Piotr A. Rodnyi, Bruno Viana,