Abstract

Thermoluminescent dosimeter CaF 2:Dy or TLD-200 was studied for its response to both gamma-ray ionizing radiation and u.v. non-ionizing radiation. Emphasis was placed on high temperature treatment. For gamma-ray irradiation, heat treatment is limited to 400°C; beyond that the sensitivity of CaF 2:Dy decreases. However, for u.v. irradiation, high-temperature treatment at 900°C is required for CaF 2:Dy to become an intrinsic dosimeter. Major studies involve TL output, changes in peak height of glow curves, optical density changes after high temperature treatment, and reproducibility.

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