Gracanin V, Guatelli S, Prokopovich D, Rosenfeld A B, Berry A
Centre of Medical and Radiation Physics, University of Wollongong, NSW, Australia.
Centre of Medical and Radiation Physics, University of Wollongong, NSW, Australia.
Phys Med. 2017 Jan;33:189-196. doi: 10.1016/j.ejmp.2016.12.016. Epub 2017 Jan 2.
The Bonner Sphere Spectrometer (BSS) system is a well-established technique for neutron dosimetry that involves detection of thermal neutrons within a range of hydrogenous moderators. BSS detectors are often used to perform neutron field surveys in order to determine the ambient dose equivalent H*(10) and estimate health risk to personnel. There is a potential limitation of existing neutron survey techniques, since some detectors do not consider the direction of the neutron field, which can result in overly conservative estimates of dose in neutron fields. This paper shows the development of a Geant4 simulation application to characterise a prototype neutron detector based on three orthogonal He tubes inside a single HDPE sphere built at the Australian Nuclear Science and Technology Organisation (ANSTO). The Geant4 simulation has been validated with respect to experimental measurements performed with an Am-Be source.
邦纳球谱仪（BSS）系统是一种成熟的中子剂量测定技术，它涉及在一系列含氢慢化剂中探测热中子。BSS探测器常用于进行中子场测量，以确定环境剂量当量H*(10)并估计人员的健康风险。现有中子测量技术存在一个潜在局限性，因为一些探测器未考虑中子场的方向，这可能导致对中子场剂量的估计过于保守。本文展示了一个Geant4模拟应用的开发，该应用用于表征澳大利亚核科学与技术组织（ANSTO）制造的、基于单个高密度聚乙烯（HDPE）球体内三根正交氦管的原型中子探测器。Geant4模拟已针对使用镅 - 铍源进行的实验测量进行了验证。
