A Portable Neutron-Gamma Spectrometer Design Based on CLLB Scintillation Detector

Neutron sources are always accompanied by the deexcitation gamma rays, discriminate neutron events in mixed radiation environments can improve the performance of spectrometer significantly. The detector based on the combination of CLLB(Cs
₂
LiLaBr
₆
) crystal and PMT is proposed to detect both γ-ray and thermal neutron events. With the method of pulse shape discrimination(PSD), this design is able to measure the energy spectrums of thermal neutron and γ-ray events at the same time. An SK filter is introduced in this system to discuss how a frequency-sensitive filter system affects other parameters and overall performance. Low power consumption ICs and high integration board-level design are used in this design in order to minimize the size of the entire system. Small size and wide-range power supply makes it appropriate in battery-powered and remote measurement applications.