摘要
在内照射活体测量中,为了用蒙特卡罗方法计算探测器对光子尤其是低能光子的探测效率,需要对探测器准确建模。通过使用蒙特卡罗模拟计算和实验测量相结合的方法来准确确定低能光子高纯锗探测器晶体的死层厚度、半径和长度;结果表明使用此方法确定的晶体尺寸来模拟计算探测器效率,在17.5～662keV光子能量范围内,低能光子高纯锗探测器探测效率的模拟计算结果与实验结果比较,相对偏差平均小于1.0%,最大为3.2%。
In in vivo measurement of internal dosimetry, accurate model of detector is needed to calculate its detection efficiency with Monte Carlo methods. We have determined the low energy photon HPGe detector crystal dead layer thickness, radius and length by Monte Carlo simulations along with experiments. The results show that when the crystal dimensions determined are used to calculate the detector efficiency, in the energy range 17.5～662 keV, average of the relative deviations between simulated and experimental results is 1.0% and the maximum is 3.2%.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2005年第3期274-277,共4页
Nuclear Electronics & Detection Technology
