Compact Solid State Neutron-Gamma Detectors for Backpack or Handheld Instruments

In this paper, we report on the characterization of detectors constructed at RMD using 1-inch, 1.5-inch, and 2-inch diameter right cylinders of CLYC and CLLBC crystals coupled to arrays of silicon photomultipliers (SiPM). Detectors constructed with small volume CLLBC crystals coupled to a 12 mm $\times $12mm total area SiPM array show an excellent energy resolution of $\sim 3$% at 662 keV and a large volume CLYC crystal when coupled to a 24 mm $\times $24 mm area array shows an energy resolution of $\sim 6.6$% at 662 keV. Both detectors show pulse shape discrimination capabilities.