陆地宇宙射线的中子剂量测量与分析

本文基于多球中子谱仪的设计原理，加工单慢化球多计数器的中子测量探头，搭建多路测量装置，形成了以双球测量方式的少道解谱剂量估算模式，并对陆地宇宙射线的中子辐射场进行测试，得到哈尔滨地区中子所致年剂量约为78 μSv/a。与多球中子谱仪的测量结果相比，中子注量率和中子周围剂量当量率的双球测量结果的相对偏差分别小于3%和12%。

Measurement and Analysis of Neutron Dose in Terrestrial Cosmic Ray

Based on the design principle of neutron multi-sphere spectrometer in this paper, the detector with multi-counter inserted into sphere moderator was machined. The measurement equipment with multi-path of the counter was connected. The dose estimation mode by unfolding of a few channels was adopted under the double-sphere measurement. The neutron field of terrestrial cosmic ray was measured for the double-sphere. The annual dose is about 78 μSv/a at Harbin area. Compared with the results of the multi-sphere spectrometer, the relative deviations of neutron fluence rate and neutron ambient dose equivalent rate for double-sphere are less than 3% and 12%, respectively.