Spectrometric Performance Of A Hpge Semi-Planar Detector With Large Diameter

We present the results of the development of the technology for the growth of HPGe ingots with a diameter of 110-120 mm and the characteristics of the first detector made of a crystal of this diameter. A semi-planar detector with a crystal size of 110x35 mm provided an energy resolution of 570 eV (on 60 keV), 702 eV (on 122 keV), 1337 eV (on 662 keV) and 1830 eV (on 1332 keV) with noise level on pulser peak of 556 eV. The relative detection efficiency of gamma radiation of the detector on the energy of 1332 keV was 65%.