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.
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