芪探测器响应效率各向异性的计算

Anisotropy of efficiency in response of stilbene detector

在Linux操作系统上使用PEGS4程序离线计算了光子及电子与芪晶体和铝的相互作用的截面数据库,并利用计算的截面数据库作为该系统中的Dosnrc程序的输入数据计算得到了芪晶体对光子各能量点的响应函数。并对来自与探测器轴线成不同角度不同能量的平行光束的探测效率进行了计算,通过测量标准γ源22Na的反冲电子谱和探测效率来与计算的效率和响应函数进行比较。

PEGS4 program of EGSnrc code system was used in calculating database of cross-section of gamma and electron reacting with stilbene and aluminum. Response functions of stilbene detector for mono-energy gamma rays were calculated with Dosnrc program and database of cross-section. Efficiencies of response for parallel beam with different energy of gamma rays in the 0°, 15°, 30°. 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, and 165° direction of the γ flight path relative to the detector＇s axis were calculated. Comparison of calculation and measurement were made between for recoil-electron spectrum and efficiencies of n Na standard gamma resources.