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Edge‐Defined, Film‐Fed Growth (EFG) Technique for the Preparation of α‐Al 2 O 3 :C Crystal with Highly Sensitive Thermoluminescence Response
Author(s) -
Yang Xinbo,
Li Hongjun,
Xu Jun,
Cheng Yan,
Su Liangbi,
Tang Qiang
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02561.x
Subject(s) - thermoluminescence , materials science , analytical chemistry (journal) , crystal (programming language) , annealing (glass) , luminescence , crystal growth , single crystal , saturation (graph theory) , crystallography , chemistry , optoelectronics , metallurgy , mathematics , chromatography , combinatorics , computer science , programming language
In this work, α‐Al 2 O 3 :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 Cr 3+ ions. After annealing in H 2 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.