用MC方法计算分析核材料移动对辐射探测器阵列探测下限的影响  

ANALYSIS OF EFFECT OF THE MOVEMENT OF NUCLEAR MATERIAL ON THE MINIMUM DETECTABLE LIMIT OF THE RADIATION DETECTOR ARRAY USING MC METHOD

作　　者：税举[1] 何彬[1] 徐从学[1] 葛坤友[2] 

机构地区：[1]第二炮兵工程学院,西安710025 [2]第二炮兵装备研究院,北京100085

出　　处：《辐射防护》2007年第1期42-46,共5页Radiation Protection

摘　　要：核辐射探测器阵列的探测下限是评价其探测能力的一种统计量的值,指在一定置信水平下,一种探测方法能够检出的最小被测量。从定性的角度看,核材料移动比静止时更难以探测(即静止比移动时的探测下限低)。本文通过建立蒙特卡罗(MC)模型并应用通用软件MCNP程序计算分析核材料的移动对核辐射探测器阵列对核材料质量的探测下限的影响。计算结果与理论分析符合。The minimum detectable limit of the nuclear radiation detector array is an important technic criteria to judge whether the detector satisfies the detecting requirements or not. From the qualitative point of view, the nuclear material are more difficult to detect when moving than static（ namely, the minimum detectable limit is lower when static than moving）. This article adopts the Monte Carlo general software——MCNP to compute and analyse the movement of the nuclear component influencing on the minimum detectable limit of the nuclear radiation detector array. The calculated result is in accord with theoretical analysis.

关 键 词：MC方法 移动 辐射探测器阵列 探测下限 

分 类 号：TL81[核科学技术—核技术及应用]