A new method for separation of signals from charged particles and gamma quanta by the shape of the rising edge of the scintillation pulse

We described a discrimination method for separating of signals from charged particles and $\gamma$-quanta by the shape of the scintillation pulse’s rising edge. This method is based on the fact that the scintillation kinetics at the build-up stage in an activated scintillator depends on the ionization density nonlinearly. This approach became realizable with the development of fast waveform digitizers with the high sampling rate, providing the more precise form of the increasing part of the scintillation pulses detection. The method’s efficiency is demonstrated by the example of a thallium-activated CsI crystal. The utilization of the method will essentially increase the performance of the charged particle scintillation pulses selection.