Abstract
Results are presented from the latest experiment with a new neutron/gamma detector, a Time-Resolved, Event-Counting Optical Radiation (TRECOR) detector. It is composed of a scintillating fiber-screen converter, bending mirror, lens and Event-Counting Image Intensifier (ECII), capable of specifying the position and time-of-flight of each event.TRECOR is designated for a multipurpose integrated system that willdetect Special Nuclear Materials (SNM) and explosives incargo. Explosives are detected by Fast-Neutron Resonance Radiography,and SNM by Dual Discrete-Energy gamma-Radiography. Neutrons and gamma-raysare both produced in the 11B(d,n+γ)12C reaction.The two detection modes can be implemented simultaneously in TRECOR,using two adjacent radiation converters that share a common opticalreadout. In the present experiment the neutron detection mode wasstudied, using a plastic scintillator converter.The measurements were performed at the PTB cyclotron, using the9Be(d,n) neutron spectrum obtained from a thick Be-target atEd ∼ 13 MeV\\@. The basic characteristics of this detector wereinvestigated, including the Contrast Transfer Function (CTF), PointSpread Function (PSF) and elemental discrimination capability.
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