NaI(Tl)晶体对γ射线响应函数的蒙特卡罗模拟  

Monte Carlo Simulation for the Response Function of NaI(Tl) Crystal to γ-ray

作　　者：曾兵[1] 葛良全[1] 郭生良[1] 程峰[1] 

机构地区：[1]成都理工大学地学核技术四川重点实验室,四川成都610059

出　　处：《核电子学与探测技术》2009年第2期394-397,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金项目(40774063);成都理工大学科技立项"γ能谱的蒙特卡罗模拟及其软件开发"(2007043K)项目联合资助

摘　　要：以137Cs放出能量为0.662MeV的γ光子在NaI(Tl)晶体中的响应函数为研究对象,探讨响应函数的计算方法。对能量沉积谱分段,计算出落在每一能量段内的概率,依此将实验测得的参数代入程序中对谱线进行拓展形成符合高斯分布的全能峰。用蒙特卡罗方法建立物理模型,利用设计的模拟软件模拟出整个光子的运动过程,同时显示出晶体探测到的γ光子响应函数。The gamma photon taking that 137Cs emit an energy as 0. 661 MeV is an object of study in response function in NaI （Tl） crystal then, probe into the calculating method of response function. Piecewise to the energy deposition spectrum, calculated in the fall on each of the probability of energy. So will the Experimental measurement parameters into the process of formation of the spectrum to expand in line with the all energy peak-Gaussian distribution. Design simulation software used to simulate the movement as a whole photon process. Based on the physical model by Monte Carlo method and displayed the crystal to detect the photon γ response function.

关 键 词：蒙特卡罗模拟 NaI(Tl)晶体 响应函数 Γ能谱 

分 类 号：TL99[核科学技术—核技术及应用]