Year
2001
Abstract
A test program of the performance of 3He neutron proportional detectors with varying gas pressures, and their response to high level gamma-ray exposure in a mixed neutron/gamma environment, has been performed. Our intent was to identify the optimal gas pressure to reduce the gamma-ray sensitivity of these detectors. These detectors were manufactured using materials to minimize their gamma response. Earlier work focused on 3He fill pressures of four atmospheres and above, whereas the present work focuses on a wider range of pressures. Tests have shown that reducing the filling pressure will further increase the gamma-ray dose range in which the detectors can be operated.