Simulation method for measurement of the cross-section of the^(14)N(n,a)^(11)B reaction using a gridded ionization chamber  

作　　者：Yi-Wei Hu Hao-Yu Jiang Zeng-Qi Cui Jie Liu Hao-Fan Bai Huai-Yong Bai Jin-Xiang Chen Guo-Hui Zhang 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,Institute of Heavy lon Physics,School of Physics.PekingUniversity,Beijing 100871,China [2]Institute of Materials,China Academy of EngineeringPhysics,Jiangyou 621907,China

出　　处：《Nuclear Science and Techniques》2021年第8期1-11,共11页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.12075008);Science and Technology on Nuclear Data Laboratory,China Nuclear Data Center;the State Key Laboratory of Nuclear Physics and Technology,Peking University(No.NPT2020KFJ22)。

摘　　要：A simulation method for measurement of the cross-section of the^(14)N(n,a)^(11)B reaction with gas and solid samples using a gridded ionization chamber(GIC)has been established.Using the simulation,the experimental spectra of both^(14)N(n,a)^(11)B events and background from other reactions can be predicted,and the experimental scheme can be optimized.According to the simulation results,the optimal experimental parameters,including the pressure of the working gas and the compositions of the working gas and the sample,can be determined.In addition,the simulation results can be used to determine the valid event area and calculate the detection efficiency for valid events.A measurement of the cross-sections of the^(14)N(n,a)^(11)B reaction at E_(n)=4.25,4.50,4.75,5.00,5.25,and 5.50 MeV,based on the 4.5-MV Van de Graff accelerator at Peking University(PKU)using a GIC as the detector for the outgoing a particles,has been performed.The good agreement of the spectra from the simulation and experiment demonstrated the universality of this simulation method,which can be used to accurately measure neutroninduced light-charged particle emission reactions.

关 键 词：Gridded ionization chamber Monte Carlo simulation Cathode–anode two-dimensional spectrum ^(14)N(n a)^(11)B reaction 

分 类 号：TL811.1[核科学技术—核技术及应用]