A new approach to the 2D radiation dosimetry based on optically stimulated luminescence of LiF:Mg,Cu,P

Abstract

A new approach to the two-dimensional (2D) spatial radiation dosimetry based on optically stimulated luminescence (OSL) phenomena is presented. By investigating prototype dosimeters in form of flat and flexible sheets made of a polymer (PDMS), with the embedded OSL active grains (LiF:Mg,Cu,P), direct measurements of the 2D dose distribution using the OSL method and self-developed optical setup were verified. We have determined the response of 2D OSL prototype silicone foils, stimulated with the blue LEDs (470 nm) and read out using the CCD camera system, after doses of beta radiation ranging from less than 0.1 Gy up to 100 Gy. We have also verified the basic dosimetric parameters of the prototype sample foils, including the sensitivity (signal per dose), linearity, repeatability and fading effect. These encouraging results are the first step towards the practical use of LiF:Mg,Cu,P 2D OSL foils as a reusable spatial dosimeter system.