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本文论述用于γ能谱测井的 Ge(Li)探头的结构和性能。该探头为柱状体,直径8.9厘米,长160厘米。探头中装有一个体积为22厘米~3的同轴 Ge(Li)探测器。探测器用液氮冷却。装好探头后,保持时间超过10小时。探头的能量分辨率为2.3千电子伏(对122千电子伏光子)和2.6千电子伏(对1333千电子伏光子)。此探头已用于兰斯塔德铀矿山的地面实验和钻孔模型中对中子活化谱进行研究。本文提出了实验结果并加以讨论。应强调指出,Ge(Li)探头将会成为钻孔活化分析的有用工具。
This article discusses the structure and performance of Ge (Li) probes for gamma-ray logging. The probe is cylindrical, 8.9 cm in diameter and 160 cm long. Probe is equipped with a volume of 22 cm ~ 3 coaxial Ge (Li) detector. The detector is cooled with liquid nitrogen. After the probe is installed, keep it for more than 10 hours. The energy resolution of the probe is 2.3 keV (for 122 keV photons) and 2.6 keV (for 1333 keV photons). This probe has been used to study the neutron activation spectrum in the ground experiments and drilling models of the Landstuart uranium mine. This article presents the experimental results and discusses them. It should be emphasized that the Ge (Li) probe will be a useful tool for drilling activation analysis.