Abstract

The Harwell type 95/0075 survey meter developed by Leake is widely used in neutron area monitoring. Since the neutron directional distribution for a stray field often remains unknown, it is important to determine the angular response and the collimated beam response of the detector. It is also important to clarify the relationship between these responses and the detector structures. This study aims to determine the angular response and the colliminated beam response of a detector based on Leake's design. The results suggest that the detector angular response is isotropic for fast neutrons; and local dependence of the response to collimated beams of thermal and intermediate energy neutrons was found to be independent of the absorber layer variations.

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