TLD reader with photon counting and dc techniques for wide range radiation dose measurement

A TLD reader incorporating the techniques of photon counting and dc methods has been developed for radiation dose measurements in the range of 10(-6) Gy (10(-2) Gy = 1 rad) to 100 Gy for varied applications in radiation protection and for dosimetry in medical physics. It utilizes state-of-the-art technology and is provided with reproducible heating programmer, glow curve output, digital dose display, check light source and data processing facilities. The reader has been designed for easy operation and maintenance. The precision of the reader is about +/- 6% (1 sigma) for 10(-5) Gy and better than +/- 2% (1 sigma) for doses greater than or equal to 0.5 cGy. Further improvements are being effected to measure doses down to 10(-7) Gy.