【摘要】 文章描述了在延迟粒子谱学研究中所常用的氦喷咀系统的粒子望远镜，并对运动的放射源的绝对探测效率进行计算。考虑具有一定分布的放射性面源，计算光栏和放射源偏离中心位置对探测效率的影响。将计算过程编制成计算机程序以处理实验数据。更多还原

【Abstract】 The calculation about absolute efficiency of particle telescope used in helium-jet system,which is employed usually in the study of beta-delayed particle spectroscopy,for detecting ra-dioactive moving source is described.The radioactive distribution of area source is considered.The influence of collimators and source deviation from center position on the detection efficiency isalso evaluated.The calculation is translated to computer program. With the program,the experi-mental data are processed and the good results are obtained.更多还原