计算机模拟γ测量谱

摘要

一个建立在微机DOS环境下的计算机模拟γ射线测量谱系统以一个实测的137Cs谱作为模板,对活化测量谱和同位素源的γ射线谱进行了成形模拟。谱中包含了对全能峰、康普顿沿、康普顿坪和反散射峰的模拟。模拟系统具有谱峰面积计算、谱成形、谱显示、谱处理、谱存盘等功能。利用该模拟程序对137Cs源、152Eu源、60Co源的γ测量谱以及锆样品和岩石样品的中子活化测量谱进行了模拟,模拟谱与实际测量谱非常接近。%A simulation system based on personal computer in DOS environment has been designed to simulate the γ-ray measurement spectrum. The γ-ray spectra for reactor neutron activation analyses and the spectra of radionuclides can be simulated in this system on the basis of modeling for an experimental spectrum of 137Cs. In the spectrum， the photopeak， Compton edge， Compton plateau and backscattering peak are simulated. This system has functions of peak area calculating， spectrum shaping， spectrum displaying， spectrum processing and spectrum saving， etc. Using this simulation system， the γ-ray spectra of 137Cs， 60Co， 152Eu and the spectra of Zr sample， rock standard sample for reactor neutron activation analyses have been simulated. The simulation spectra are similar to the spectra measured in the actual experiment to a great extent.