Potential reduction interior point algorithm unfolding of neutron energy spectrum measured by recoil proton method  

作　　者：王冠鹰 韩然 欧阳晓平 何锦成 颜俊尧 

机构地区：[1]North China Electric Power University, Beijing 102206, China [2]Beijing Institute of Spacecraft Environment Engineering, Beijing 100029, China [3]Northwest Institute of Nuclear Technology, Xi'an 710024, China

出　　处：《Chinese Physics C》2017年第5期181-185,共5页中国物理C（英文版）

基　　金：supported by Fundamental Research Funds for Central Universities(2016XS61);Opening Foundation of State Key Laboratory of Intense Pulsed Radiation Simulation and Effect

摘　　要：A reconstruction algorithm for unfolding neutron energy spectra has been developed,based for the first time on the potential reduction interior point algorithm.This algorithm can be easily applied to neutron energy spectrum reconstruction in the recoil proton method.We transform the neutron energy spectrum unfolding problem into a typical nonnegative linear complementarity problem.The recoil proton energy spectrum and response matrix at angles of 0？and 30？are generated by the Geant4 simulation toolkit.Several different neutron energy test spectra are also employed.It is found that this unfolding algorithm is stable and provides efficient,accurate results.A reconstruction algorithm for unfolding neutron energy spectra has been developed,based for the first time on the potential reduction interior point algorithm.This algorithm can be easily applied to neutron energy spectrum reconstruction in the recoil proton method.We transform the neutron energy spectrum unfolding problem into a typical nonnegative linear complementarity problem.The recoil proton energy spectrum and response matrix at angles of 0？and 30？are generated by the Geant4 simulation toolkit.Several different neutron energy test spectra are also employed.It is found that this unfolding algorithm is stable and provides efficient,accurate results.

关 键 词：neutron proton interior nonnegative nuclei satisfactory match polyethylene directional circles 

分 类 号：O571.5[理学—粒子物理与原子核物理]