摘要
在了解CZT探测器结构的基础上,用蒙特卡罗程序MCNP对探测器中光子输运过程进行模拟计算,得到光子在探测器中沉积能量的大小及位置信息。编程读取这些信息并计算出γ射线能谱。考虑到所用探测器的实际情况,提出了一个简化的海克公式计算电荷收集效率,对法诺因子及噪声的影响进行了展宽处理。计算得到的γ能谱与实验谱基本一致,全能峰的峰位和低能尾迹得到较好地模拟。
Based on the detector detailed geometry, a Monte Carlo code MCNP was used to simulate photon transport in CZT detector in order to get the magnitude and position for the energy deposit. The data were input to the program of ours, the gamma-ray spectrum was constructed. Taking into account the geometry of the detector, a simplified Hecht equation was introduced to calculate charge collection efficiency and, then the gamma-ray spectrum was expanded to include the effects of Fano factor and electronic noise. The calculated result, especially the position of peak for full energy and the low energy tall of peak are in good agreement with experiments.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2008年第1期52-55,共4页
Nuclear Electronics & Detection Technology
