Geant4 simulation of multi-sphere spectrometer response function and the detection of 241Am–Be neutron spectrum

作     者：Xiao-Fei Jiang Jing Cao Chun-Yu Jiang Ze-Jie Yin 

作者机构：College of Big Data and Information EngineeringGuizhou UniversityGuiyang 550025China State Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of ChinaHefei 230026China Department of Modern PhysicsUniversity of Science and Technology of ChinaHefei 230026China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2017年第28卷第12期

页      面：204-208页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：supported by ITER Plan National Major Project(No.2008GB109000) the Introduces Talents Scientific Research Project of Guizhou University(2014,No.32) 

主　　题：Response function Neutron energy spectrum Multi-sphere Geant4 241Am–Be G4NeutronHPThermalScattering 

摘      要：This paper is aimed at detecting the neutron spectrum of^(241)Am–Be, a widely used neutron source, with the SP9 ~3He proportional counter, which is a multi-sphere spectrometer system of eight thermal neutron detectors embedded in eight polyethylene(PE) spheres of varying diameters. The transport processes of a neutron in the multi-sphere spectrometer are simulated using the Geant4 code. Two sets of response functions of the PE spheres are obtained for calculating the^(241)Am–Be neutron *** Function 1 utilizes the thermal neutron scattering model G4 Neutron HPThermal Scattering for neutron energies of ≤4 eV, and Response Function 2 has no thermal treatment. Neutron spectra of an^(241)Am–Be neutron source are measured and compared to those calculated by using the response functions. The results show that response function with thermal treatment is more accurate and closer to the real spectrum.