摘要
为了计算某未知介质对γ射线的线吸收系数,建立了两种模型:首先用MCNP程序和γ射线能谱法测量了不同能量射线下铅、铝线吸收系数,并与文献值进行对比,测量误差在5%以内,明确了方法的可行性。然后分别用两种方法计算了未知物料在60Co源下的线吸收系数,结果偏差为4.53%,可以确认计算结果的准确性,为γ射线在未知物料中线吸收系数的测定提供了可靠的方法。
For calculating the γ-ray line absorption coefficient in some unknown materials,two models were conceived,and gauged the line absorption coefficient of γ-ray with different energy in Pb and Al materials with the approaches of MCNP program and γ-ray energy spectrum analysis.The results were compared with the values of generally acknowledged.The measuring error was less than 5%,the feasibility of the two methods were proved.The unknown material line absorption coefficient with the 60 Co source is calculated by the two methods separately,and the deviation is 4.53%,which can provide one reliable way for gauging the γ-ray line absorption coefficient in unknown material.
出处
《科学技术与工程》
北大核心
2013年第22期6580-6582,6620,共4页
Science Technology and Engineering
基金
国家军品配套项目(JPPT-115-5-882)资助
关键词
MCNP程序
γ射线能谱法
线吸收系数
MCNP program γ-ray energy spectrum analysis line absorption coefficient
