Gamma-ray spectral energy resolution calibration based on locally constrained regularization for scintillation detector response:methodology,numerical,and experimental analysis  

作　　者：Guo-Feng Yang Wen-Zheng Peng Dong-Ming Liu Xiao-Long Wu Meng Chen Xiang-Jun Liu 

机构地区：[1]School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China [2]State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China [3]China National Logging Corporation,Xi’an 710200,China [4]China Oilfield Services Limited,Langfang 065201,China

出　　处：《Nuclear Science and Techniques》2025年第4期92-104,共13页核技术(英文)

基　　金：supported by the National Natural Science Foundation of China(No.41804141)。

摘　　要：Energy resolution calibration is crucial for gamma-ray spectral analysis,as measured using a scintillation detector.A locally constrained regularization method was proposed to determine the resolution calibration parameters.First,a Monte Carlo simulation model consistent with an actual measurement system was constructed to obtain the energy deposition distribution in the scintillation crystal.Subsequently,the regularization objective function is established based on weighted least squares and additional constraints.Additional constraints were designed using a special weighting scheme based on the incident gamma-ray energies.Subsequently,an intelligent algorithm was introduced to search for the optimal resolution calibration parameters by minimizing the objective function.The most appropriate regularization parameter was determined through mathematical experiments.When the regularization parameter was 30,the calibrated results exhibited the minimum RMSE.Simulations and test pit experiments were conducted to verify the performance of the proposed method.The simulation results demonstrate that the proposed algorithm can determine resolution calibration parameters more accurately than the traditional weighted least squares,and the test pit experimental results show that the R-squares between the calibrated and measured spectra are larger than 0.99.The accurate resolution calibration parameters determined by the proposed method lay the foundation for gamma-ray spectral processing and simulation benchmarking.

关 键 词：Energy resolution REGULARIZATION Gaussian broadening Spectral analysis Scintillation detector 

分 类 号：O57[理学—粒子物理与原子核物理]