康普顿散射成像与测量实验系统研发

Research of Compton Scattering Imaging and Measurement Experimental System

围绕康普顿散射成像和测量实验需求,开展了X射线康普顿散射实验系统研发及实验研究。针对系统准直器对成像分辨率及光束集光立体角的影响进行仿真,并设计了实验系统的结构。在研究探测器对不同能量X射线的探测效率的基础上,建立了光通量计算模型,分析了探测器参数对散射X射线光通量的影响,提高了实验系统的探测效率。在对X射线康普顿散射实验的研究中,获得了清晰的散射图像,初步测量了PMMA(polymethl methacrylate,聚甲基丙稀酸甲酯)的散射强度。该系统可以用于康普顿散射成像演示实验和物质散射分析的研究。

Centering on the needs of Compton scattering imaging and measurement experiments,the development of X-ray Compton scattering experimental system and experimental research were carried out.The influence of the system collimator on the imaging resolution and the solid angle of the beam collection was simulated,and the structure of the experimental system was designed.Based on the study of the detection efficiency of the detector for different energies of X-rays,the luminous flux calculation model was established,the influence of detector parameters on the luminous flux of scattered X-rays was analyzed,and the detection efficiency of the system was improved.X-ray Compton scattering experiments were carried out,clear scattering images were obtained,and the scattering intensity of PMMA was preliminarily measured.The system can be used for demonstration experiments of Compton scattering imaging and studies of material scattering analysis.