【摘要】 本文讨论了反康普顿γ谱仪在应用中所显示出的局限性以及这种谱仪在正常运行时（使用反符合线路）做效率刻度所遇到的问题。采用具有圆锥形开口的准直器限定源的γ射线只能入射到主探测器上，从而可以刻度出实用的效率曲线更多还原

【Abstract】 This paper describes the anti Compton γ spectrometer limitations in applications and the problems in its efficiency calibration when it was used with anti coincidence electronics. The collimator with a cone hole was used for limiting the γ ray from a point source to make it coming only into main detector (HPGe), hence the practical efficiency calibration could be completed under the normal condition using this γ spectrometer. (更多还原