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本文讨论用已定度过的次级标准照射量仪对用于(n,γ)混合场快中子吸收剂量测量的电离室进行光子定度的方法,并给出组织等效电离室(IC-17A)、碳电离室(IC-17G)和镁电离室(IC-17M)在~(60)Co和~(137)Cs两种光子束中的定度因子R/Q和灵敏度KQ’/D_(TE,λ)。
This paper discusses the method of photon calibration of the ionization chamber used for fast neutron absorption dose measurement of (n, γ) mixed field with a calibrated secondary standard irradiance meter, and presents the method of tissue equivalent ionization chamber (IC -17A), the scaling factor R / Q and the sensitivity KQ ’/ K in two kinds of photon beams of ~ (60) Co and ~ (137) Cs in carbon ionization chamber (IC- D_ (TE, λ).