Optimization of PGNAA set-up for the elements detection in aqueous solution  

作　　者：JIA WenBao HEI DaQian CHENG Can ZHANG HaoJia SHAN Qing 

机构地区：[1]College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics

出　　处：《Science China(Technological Sciences)》2014年第3期625-629,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11375087);National Key Scientific Instrument and Equipment Development Projects(Grant No.2013YQ40861)

摘　　要：A prompt gamma neutron activation analysis(PGNAA)set-up was developed for the elements detection in aqueous solution,which includes a 241Am-Be neutron source and a 4-inch BGO detector.The geometry of set-up is determined by a series of simulations with the MOCA code to improve the efficiency of the elements detection.The thermal neutron flux and the gamma-ray self-absorption are considered during the optimization calculations.Experiments were performed to validate the set-up using samples including chlorine and mercury,respectively.The result shows that the characteristic peak count has linear relationship with the chlorine and mercury concentration changing.The minimum detectable concentrations of chlorine and mercury were found as 54 mg/L and 51.4 mg/L,respectively.

关 键 词：PGNAA elements detection minimum detectable concentrations MOCA 

分 类 号：O657[理学—分析化学]