APPLICATION OF GAMMA-SPECTROMETER ON THE BASIS OF CdTe IN DOSIMETRY OF HIGH-ENERGY BREMSSTRAHLUNG

The conditions are studied of using a semiconductor gamma-spectrometer with a "warm" detector on the basis of CdTe for dosimetry support of photonuclear technologies with the use of high-energy high-power bremsstrahlung radiation. For a method of activation dosimetry based on the In-115 (gamma, gamma') In-115m reaction, the analysis and optimization of measurement conditions of an activated In-dosimeter with a CdTe-spectrometer have been conducted using a computer simulation technique. The dependence of detector sensitivity on dosimeter size has been established. It was shown, that one can to control the sensitivity of a dosimetry system within the span 1 kGy...10 MGy and higher by change the dosimeter dimensions. The conditions of measurement of activity of the In-115m isomer on the samples from natural indium by the instrumentality of a CdTe-spectrometer were investigated. A procedure of the activation dosimeter calibration was discussed