Research On Angle Sensitive γ-ray Detecting System Based On Scintillator Array

Radiation environmental monitoring is an important part of environmental monitoring,also the basis of radiation environmental management.The location ofγ-ray sources is an indispensable part of radiation environmental monitoring.When using radiation detectors to locate γ-ray sources,we need to consider not only the detection effect of the detector,but also the detection cost,the portability of the detector,and the energy range of γ-ray it can detect.After analyzing some basic ideas of detectors with the function of locating the γ-ray source,this work tries to combine the advantages of two ideas of them,to solve problems such as portability and cost.The main work of this paper can be divided into three parts.In the first part(section 2),the mathematical model of scintillator counting angle response is established,several factors affecting the angle response are obtained,and on this basis,a detector with high resolution for incident ray angle is designed.In the second part(section 3),the counting angle response of scintillators in two shapes and states was verified by experiment.The experimental results show the correctness of the angle response model and provide a basis for the selection of detector.In the third part(section 4),a detector array with a simple configuration is proposed,and its angular resolution is verified by the Monte Carlo program.Through the work of this paper,the following conclusions can be drawn: in the case that other factors remain unchanged,the bigger the aspect ratio of a square scintillator is,or the larger the top surface area of the scintillator is,or the lower the energy of the detected γ-ray is,the more obvious the angular response of the scintillator count is.From the results,after the application of KNN algorithm on the proposed array configuration,the angular resolution of the whole detection system can reach the expected level.Moreover,the whole detection system can achieve small size and weight.