角度响应的室内测量在实验室内研究了7种不同大小的圆柱形探测器的角灵敏度,这类探测器容易购得并普遍用于测量工作。两磅重的钍氧化物置于距每个晶体中心2米处,采用多道分析器记录伽玛射线谱。利用这种探测器-源排列,冲击探测器的辐射极接近于平行,即接近于航测的位置。起初记录源位于探测器轴向时的谱,然后记录不同θ角时的谱,θ是探测器轴向和源与探测器中心之间连线的夹角。然后由每种位置上单位时间内的计数来计算探测器的灵敏度,利用2.41—2.81百万电子伏 Angular Response Indoor Measurement Angular sensitivity of seven different sizes of cylindrical detectors was studied in the laboratory and was readily available and commonly used in surveying. Two pounds of thorium oxide was placed 2 meters from the center of each crystal and a multi-channel analyzer was used to record the gamma ray spectra. With this detector-source arrangement, the impact detector’s radiation is close to parallel, ie near the aerial location. Initially, record the spectrum of the source in the axial direction of the detector and then record the spectrum at different angles. Theta θ is the angle between the detector axis and the source and detector center. The detector’s sensitivity is then calculated from the counts per unit time for each location, using 2.41-2.81 million electron volts