Optimization of characteristic of BGO gamma-ray detectors

One of the main experimental physics research problem to be solved in the frame of project TANGRA (TAgged Neutron and Gamma RAys) is to measure the angular distribution of gamma-rays from the inelastic scattering of 14.1 MeV neutrons on some important for nuclear sciences and engineering isotopes with a bigger accuracy and confidence. The first step that we did in this direction was to optimize the energy and time resolution of the gamma-detectors used in our TANGRA setup. For this purpose, we investigated the time and energy characteristics of the BGO scintillators with 2 different types of photo-multiplier tubes (PMT). The signals from the PMT were recorded with a computerized 32-channel digital data acquisition (DAQ) system, utilizing two 16-channel, 14-bit, 100 MHz, ADC boards ADCM16-LTC. From the digitized analog signals, we obtained their amplitude and time characteristics simultaneously