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本文介绍应用 FBX 化学剂量计测定 n-γ混合辐射场中0.3—3Gy 范围内的组织吸收剂量。实验测定了 FBX 剂量计体系的 G_o 值,当中子能量为15MeV 时,G_n=(40.6±1.8)/100eV。比较了由富氢的聚乙烯和缺氢的聚四氟乙烯材料制成的盛装 FBX 剂量计溶液的照射管对剂量测量的影响,实验表明,在照射管尺寸为直径20mm,壁厚2mm,高60mm 的条件下,用这两种材料对剂量测量结果的影响不明显。
This article describes the use of FBX chemical dosimeters to measure the tissue absorbed dose in the n-γ mixed radiation field in the 0.3-3 Gy range. The G_o value of the FBX dosimeter system was experimentally determined. When the neutron energy was 15 MeV, G_n was (40.6 ± 1.8) / 100eV. The effect of irradiation tube containing FBX dosimeter solution made of hydrogen-rich polyethylene and hydrogen-deficient polytetrafluoroethylene material on the dose measurement was compared. The experiment shows that when the irradiation tube size is 20mm in diameter, 2mm in wall thickness, 60mm conditions, the use of these two materials on the dose measurement results are not obvious.