Development of a High Energy Neutron Detector
SAN FRANCISCO UNIV CA DEPT OF PHYSICS
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A detector is being developed for the measurement of high energy neutron fluences. A series of neutron energy thresholds are employed to yield spectral information. The method employed is to measure the fluences of elastically scattered recoil nuclei from low Z 4Z8 materials. Nuclear track recorders are used for this purpose. A cellulose nitrate track recorder which selectively registers recoil nuclei in the presence of He4 particle backgrounds has been developed. Neutron energy thresholds are due to selected thicknesses of gold degrader films which separate the recoil particle radiator and the track recorder. A computer code FLUENZ has been written to supplement detector response measurements and to determine response over the full useful neutron energy range. Another computer code HENDU is being adapted to the unfolding of neutron spectra from the detector measurements.
- Nuclear Instrumentation