为改进检测油垢厚度方法,本文用石蜡模拟油垢,用γ射线垂直照射距源为25cm处的石蜡样品.在与石蜡样品25cm的距离处,以不同的散射角和同一探测立体角接收散射光子数.发现散射γ光子计数与被测石蜡厚度之间存在不同的线性关系.本实验测得最佳线性相关系数平方值为0.9859,平均测量精度为2.14mm. In order to improve the method of detecting grease thickness, paraffin wax was used to simulate greasy grease, and γ-rays were used to illuminate paraffin samples with a distance of 25cm from the paraffin samples. The scattering photons were received at different scattering angles and the same detection angle at a distance of 25cm from the paraffin samples It is found that there is a different linear relationship between the scattering γ photon count and the measured paraffin thickness.The best linear correlation coefficient measured in this experiment is 0.9859 and the average measurement accuracy is 2.14mm.