Measuring device for thermoluminescence dosimetry

Abstract

In radiobiological work there is a need for very narrow measuring probes which can be inserted in small cavities. A radiation dosimeter utilizing the thermoluminescent properties of LiF has been developed. Permanently filled containers are used. The container material is Teflon, which can tolerate the temperature needed for read-out. The outer diameter of the Teflon tube is 1.5 mm and the wall thickness is 0.25 mm. One dosimeter consists of 10 mg of LiF powder enclosed in the Teflon tube. It is reused several times and the read-out is made without unloading the powder. Each probe contains a number of small dosimeters, so measurements are obtained at several points simultaneously. The specially built read-out device is described in detail. It is at present being used for measurements in patients.