Comparison of neutron energy spectrum unfolding methods and evaluation of rationality criteria

Bonner sphere spectrometer and ORTEC electronics system were used to obtain the original data of measuring at Qinshan Nuclear Power Plant, and the initial analysis based on EXCEL.Geant 4 were used to calculate the response function of BSS, 6 energy responses were calibrated in a monoenergetic neutron field in PTB;Unfolding spectrum based on maximum entropy and iteration method are from UMG, genetic algorithm code was self achieved by C++ within the ROOT framework.