Evaluation of polyvinyl toluene scintillators for fast neutron imaging
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We evaluated polyvinyl toluene (PVT) scintillators fabricated with different emitting dopants and scintillator optical configurations for fast neutron imaging. A neutron imaging apparatus was constructed to study scintillators under MeV neutron exposure. PVT with 2% Xylyl Flrpic emitter was identified as the brightest. The addition of a black backing to the scintillator, compared with a specular reflector film backing, improved the resolution of the neutron image obtained with the PVT scintillator by about 2 ×. It is concluded that a PVT imaging screen with 2% Xylyl Flrpic, configured with a black backing, provides the best quality fast neutron image of the scintillators tested.
KeywordsNeutron imaging Fast neutron Organic scintillator PVT Spatial resolution Light yield
We would like to thank the financial support of Lawrence Livermore National lab and staff at The Ohio State University Nuclear Reactor Laboratory. The contributions of CB and TM were supported in part by the U.S. Department of Energy, under Grants No. DE-FG02-88ER40387 and DE-NA0002905.
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