Basic study on response of a small size dosimeter using optical fiber and Ce:CaF₂ OSL element

Abstract

  We fabricated a small size optical fiber type dosimeter system using Ce:CaF₂ OSL element. We evaluated basic response of fabricated dosimeter to radiations of X-ray and high-energy carbon ions. When irradiating X-ray, good linearity can be confirmed. With increasing linear energy transfer (LET) of carbon ions, luminescence efficiency of Ce:CaF₂ decreases. Compared with the conventional small dosimeter using Eu:BaFBr OSL element, Ce:CaF₂ shows a small deterioration in the luminescence efficiency.