A Compact Dual Gamma Neutron Detector Based on NaI(Tl+Li) Scintillator Readout with SiPM

Sodium iodide crystal co-doped with thallium and lithium is a promising scintillator wide application prospects for dual gamma neutron detection. In this study, compact gamma/neutron detector was developed based on 2-inch NaI(Tl+Li) (NaIL) readout 8 × silicon photomultiplier (SiPM) array. Dedicated transimpedance amplifier circuit the SiPM The energy resolution response linearity array were evaluated compared to those obtained tube (PMT) readout. 661.6 keV rays measured as 7.0% 6.5% PMT, respectively. linear of almost same that PMT in range up ~4 MeV. Neutron pulse shape discrimination by acquiring waveforms digitizer (12 bit/250 MSPS) off-line analysis. best figure merit (FOM) 3.75 optimized parameters, close performance (FOM = 4.07). experimental results show NaIL exhibit equivalent NaI(Tl) detectors excellent neutron/gamma discrimination, making it especially suitable devices requiring detection capabilities.