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利用由60Co源、NaI(Tl)探测器和微机多道谱仪等组成的实验装置,测量了油垢厚度的散射光子计数。同时应用蒙特卡罗模拟针对不同的土层厚度及土层中含水量检测油垢厚度的散射光子数。结果显示,随着土层厚度的增加,油垢厚度的探测灵敏度呈减小趋势,通过初步模拟发现,土层中含水量对检测油垢厚度的影响有一定的规律。
Scattered photon counts of grease thicknesses were measured using an experimental setup consisting of a 60Co source, a NaI (Tl) detector and a computerized multispectral spectrometer. At the same time, Monte Carlo simulation was applied to detect the scattering photon number of grease thicknesses according to different soil thicknesses and soil water content. The results show that with the increase of soil thickness, the detection sensitivity of grease thickness tends to decrease. According to the preliminary simulation, it is found that the influence of water content in soil layer on the grease thickness measurement has a certain rule.