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引言近年来国内外在环境γ辐射照射量率(或剂量率)巡测工作中,大都采用圆柱形闪烁体组成的探测器。γ辐射束线入射方向改变时探测器照射量率响应值即随着改变。个别由于圆柱形闪烁体尺寸选择不当,加之被巡测γ辐射束线能量的非单一性,从而引起探测器响应值方向依赖的反应就更为强烈。甚至等于或超过IEC/TC一45B参考标准(在0°—90°入射角范围内)的要求25％。本文采用探测器接受入射γ辐射束线几何垂直
Introduction In recent years, at home and abroad in the environmental gamma radiation exposure rate (or dose rate) touring work, mostly composed of cylindrical scintillator detector. When the incident direction of γ ray beam line changes, the response value of detector radiation rate changes with the change. Some due to the improper selection of the cylindrical scintillator size, combined with the non-uniformity of the energy of the gamma radiation beam being inspected, the response of the detector to the direction of the response value is even more intense. Even equal to or exceed the IEC / TC 45B reference standard (0 ° -90 ° angle of incidence) requirements 25%. In this paper, the detector is used to receive the incident γ radiation beam line geometric vertical