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本文给出了一种采用固体核径迹探测器测量低能(0.5 e V以下能量)中子的双片径迹计数方法,利用蒙特卡罗模拟和实验,统计分析了低能中子引起的探测器单位面积径迹密度。结果显示,采用双片径迹计数方法,实现了CR39对于低能中子的响应,可以对低能中子引起的个人剂量进行估算。应用在中子职业个人剂量监测时,有效甄别了背景径迹的影响,因而降低了测量误差,对减小中子个人剂量监测的测量不确定度也是一个可行的方法。
In this paper, we present a two-track track counting method using solid nuclear track detectors to measure neutrons with low energy (energy below 0.5 eV). Monte Carlo simulations and experiments are performed to statistically analyze the detectors caused by low energy neutrons Track density per unit area. The results show that using a two-shot track counting method, the response of CR39 to low-energy neutrons can be achieved and the individual dose caused by low-energy neutrons can be estimated. When applied to neutron occupational personal dose monitoring, the effect of background track is effectively discriminated, thereby reducing the measurement error and also a feasible method for reducing the measurement uncertainty of neutron personal dose monitoring.