Crosstalk and Time Response of a Plastic Scintillation Optical Fibers Array for Neutron Imaging

The cladding material, to eliminate scattered neutrons and recoil-protons crosstalk, among the plastic scintillation optical fibers was optimized by MCNP Code and gold or tungsten metal powder (⩽50μm) was selected. A prototype of plastic scintillation optical array was built. The array was irradiated by a ⁶⁰Co gamma source, and its timing response (2.74ns) was obtained in a Time of Flight (TOF) system which is sensitive to 50ps.