Properties of novel fluorescent nuclear track detectors for use in passive neutron dosimetry

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• 作者：G.J. Sykora ; M. Salasky ; M.S. Akselrod
• 关键词：Nuclear track detectors ; Neutrons ; Dose dependence ; Aluminum oxide crystal ; Laser-induced fluorescence ; Confocal microscopy
• 刊名：Radiation Measurements
• 出版年：2008
• 期刊代码：71_13504487
• 类别：ce
• 出版时间：February-June 2008
• 卷：43
• 期：2-6
• 页码：1017-1023
• 文件大小：659 K

摘要

A novel technique for neutron dosimetry has been developed using fluorescent nuclear track detectors (FNTDs) as a possible replacement for CR-39 plastic nuclear track detector (PNTD) technology. New aluminum oxide crystals containing aggregate oxygen vacancies and doped with carbon and magnesium (Al₂O₃:C,Mg) are imaged using laser scanning confocal fluorescence microscopy. Advancements in image processing allow for better detection of fluorescence tracks. Dose dependences were obtained for four types of neutron converters. A comparison between enriched ⁶LiF (TLD-600) and LiF with natural abundance of ⁶Li (TLD-100) was made. Dependence on angle of incidence for fast neutrons was investigated and compared with simulations based on neutron scattering theory. The reusability and re-readability of detectors were tested and confirmed to be satisfactory.