Stabilini A, Meier K, Yukihara E G
Department of Radiation Safety and Security, Paul Scherrer Institute, PSI Villigen, Switzerland.
Politecnico di Milano, Dipartimento di Energia, via la Masa 34 Milan, Italy.
Radiat Prot Dosimetry. 2018 Aug 1;180(1-4):220-224. doi: 10.1093/rpd/ncx186.
The objective of this work is to demonstrate the possibility of performing fast neutron dosimetry up to 5 Sv using optical absorbance of polyallyl diglycol carbonate (PADC) detectors, obtained through grey level analysis of PADC images acquired with a commercial track-counting dosimetry system, and estimate the uncertainties involved. PADCs were irradiated with doses from 100 mSv to 5 Sv (252Cf source) and etched. PADC images were acquired using the TASLIMAGE™ Neutron Dosimetry System (Track Analysis Systems Ltd.) and analysed to obtain the grey levels and the optical absorbance. The absorbance from different detectors and batches was analysed to determine the uncertainties involved, from which the final uncertainty in the method, ~30% and dominated by the uncertainty in the calibration curve, was estimated. A dose estimation <2 Sv can also be performed using a 'universal curve' by normalising the absorbance to that of a detector irradiated with 1 Sv. The data presented here allows the extension of the dose range of track counting systems using no additional equipment, only the images already acquired by the systems.
这项工作的目的是证明，利用聚二甘醇碳酸烯丙酯（PADC）探测器的光吸收来进行高达5 Sv的快中子剂量测定的可能性。该光吸收是通过对用商业径迹计数剂量测定系统采集的PADC图像进行灰度分析获得的，并估计其中涉及的不确定性。用100 mSv至5 Sv的剂量（²⁵²Cf源）对PADC进行辐照并蚀刻。使用TASLIMAGE™ 中子剂量测定系统（径迹分析系统有限公司）采集PADC图像，并进行分析以获得灰度和光吸收。分析了来自不同探测器和批次的吸光度，以确定其中涉及的不确定性，据此估计该方法的最终不确定性约为30%，且主要由校准曲线的不确定性主导。通过将吸光度归一化为用1 Sv辐照的探测器的吸光度，也可以使用“通用曲线”进行<2 Sv的剂量估计。这里给出的数据使得无需额外设备就能扩展径迹计数系统的剂量范围，仅利用系统已经采集的图像即可。
