Abstract
This paper presents the characteristics of the ambient and directional dose equivalent rate meter, AE133B developed by Applied Engineering Inc., Japan, in terms of variation of response with photon radiation energy and angle of incidence, and dose rate dependence. The resultant response using ISO gamma radiation and narrow spectrum series X-radiation for ambient dose equivalent was found to be within 40% in the combined rated range of photon energy, 30 keV to 1250 keV and angles of radiation incidence, 0°to 60°, and those for directional dose equivalent was within 40% in the combined rated range of 12 keV to 250 keV and angle of radiation incidence, 0°to 75°. These resultant characteristics sufficiently met the requirements of the standard, IEC 60846-second edition. The ambient and directional dose equivalent rate meter was found to have sufficient specifications of energy and angular dependence.
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