γ射线透射曲线的数值模拟研究  

Numerical Investigation of the Transmission Curve of typical γ Ray

作　　者：邵文成[1] 孙普男[1] 刘辉[1] 阎丽莉[1] 

机构地区：[1]黑龙江大学物理科学与技术学院,哈尔滨150080

出　　处：《核电子学与探测技术》2008年第5期965-967,924,共4页Nuclear Electronics & Detection Technology

基　　金：黑龙江省自然科学基金(A0305);哈尔滨市科学基金(2004FLXJ014)

摘　　要：提出一种用蒙特卡罗方法计算γ射线穿过辐射防护材料时透射曲线的方法，用蒙特卡罗程序MCNP计算了典型γ射线源137^Cs和60^Co产生的γ射线穿过重金属铅时透射率随铅屏蔽厚度变化的透射曲线，并根据透射曲线得到γ射线被衰减不同倍数时所需铅屏蔽的厚度。将铅屏蔽厚度计算结果与已发表数据进行对比，当衰减倍数取2～10^6之间的值时，计算结果与已发表数据符合较好，为γ射线源的辐射防护设计工作提供参考。A new method calculating the transmission curve applied by Monte Carlo simulation is proposed. Calculation of the transmission curve when typical γ ray emitted by 137^Cs and 60^Co get through lead are performed. Based on transmission curve the thickness required by attenuating γ ray to certain degree are obtained. Comparisons between the calculated result and the published data are performed. The result of Monte-Carlo simulation are in good agreement with the published data.

关 键 词：透射曲线 透射率 屏蔽厚度 MCNP程序 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]