小角度入射法测油垢厚度的初步实验研究

Preliminary Experimental Studies on Measuring the Grease Stain Thickness in the Oil Pipeline by Acute Angle Incident Method

本工作采用石蜡模拟油垢,用^(60)Co放射源平均能量1.25 MeV的γ射线小角度入射,分别在小角度和大角度散射角内接收散射γ射线。结果显示,散射γ计数与被测石蜡厚度之间存在线性关系,而且小角度散射法测量结果比大角度散射法所测结果更好。

The oil crust was simulated by the paraffin, and the 1.25 MeV γ ray from a 60Co source was irradiated hy acute angle. The scattered γ ray photons from both of an acute and a large scattering angle were collected by a detector, and a linear relationship between the counting numbers of the scatteringγ rays and the thickness of the paraffin were obtained. The experimental results showed that the results of the small angle scattering method was better than that of the large scattering angle method.