Abstract
A neutron area monitor should provide an energy response of a 1-cm dose equivalent according to International Commission on Radiological Protection recommendations. A prototype neutron area monitor has been developed using a silicon detector with a polyethylene moderator. The characteristics of neutron energy response to dose equivalent on this monitor were confirmed by the thermal neutron field and a monoenergetic fast neutron field using an accelerator. The neutron detection is based on the principle of the ionization of alpha particles generated by the nuclear reaction of thermal neutrons ({sup 10}B(n,{alpha}){sup 7}Li) and recoil protons generated from the interaction of fast neutrons with hydrogen compounds (proton radiator). One important feature of the monitor is its performance compensatory precision within {plus minus}50% in response to a 1-cm dose equivalent. Another is its performance for the energy range from {approximately}0.025 eV to 15 MeV with only one silicon detector.
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