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- Title
Edge-Defined, Film-Fed Growth (EFG) Technique for the Preparation of α-Al<sub>2</sub>O<sub>3</sub>:C Crystal with Highly Sensitive Thermoluminescence Response.
- Authors
Yang, Xinbo; Li, Hongjun; Xu, Jun; Cheng, Yan; Su, Liangbi; Tang, Qiang
- Abstract
In this work, α-Al2O3:C, a highly sensitive thermoluminescence dosimetry crystal, was grown by the EFG method in which a graphite heating unit and shield acted as the carbon source during the growth process. The optical, luminescent properties and dosimetric characteristics of the crystal were investigated. The as-grown crystal shows a single glow peak at 536 K, which is associated with Cr3+ ions. After annealing in H2 at 1673 K for 80 h, the crystal shows a single glow peak at 460 K and a blue emission band at 415 nm. The thermoluminescent response of the annealed crystal shows linear–sublinear-saturation characteristics in the dose range from 5 × 10−6 to 100 Gy.
- Subjects
CRYSTAL growth; THERMOLUMINESCENCE dosimetry; THERMOLUMINESCENCE; ANNEALING of crystals; PHOSPHORS; CARBON &; graphite products
- Publication
Journal of the American Ceramic Society, 2008, Vol 91, Issue 9, p3098
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2008.02561.x