【摘要】 <正> 在n-γ混合场中,普遍采用双探测器测量生物组织的中于吸收剂量。当用组织等效电离室(T)和光子剂量计(U)组合,测量中子吸收剂量(D_n)和伴随的γ剂量(D_γ)时,将有如下方程组:更多还原

【Abstract】 This paper describes the principle and method for determining the relative neutron sensitivity (KU) of the photon dosimeters. With a modified lead attenuation method, the KU values of a 2cm3 C-CO2 (FWT, IC-17G) and a 3cm3 Al-Ar (FWT, IC-17Al) chambers were determined as 0.271±0.021 and 0.132±0.006 respectively. KU of a Geiger-muller counter (FWT, GM-2(446)) was determined as 0.0173±0.002. Comparing these results with other experimental data one can find that the relative neutron sensitivity (KU) of the photon dosimeters was not very sensitive to the μ/f of photon component. The uncertainly of KU measured in the lead filtration method was estimated. The neutron and gamma absorbed-doses for ICRV muscle tissues in same mixed field have been measured by technique of paired detectors.更多还原