Large area thermal and fast neutron detector based on Bragg-peak detection
Hertel, Nolan E.
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There is an ongoing effort to produce a near term replacement for 3He tubes. These thermal neutron detectors were a staple of neutron detection due to their large size, high efficiency and neutron‐gamma discrimination capabilities. The researchers at PNNL have envisioned a system which utilizes lithium fluoride (LiF) grains surrounded by scintillator materials as a possible replacement for 3He tubes. In support of the DOE/NA‐22 Scintillator Bead project, Georgia Tech has collaborated with PNNL to show feasibility of using micron‐sized scintillation coatings with micron‐sized 6LiF beads for the detection of thermal neutrons in optical fiber geometries. Georgia Tech’s efforts have included optical modeling of the fibers, neutron detector modeling, and the investigation of various coating techniques. Georgia Tech has also investigated the potential testing of lithium fluoride grains and coatings should they come available.