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

in this article the oil crust is simulated by the paraffin, and the 1.25MeV γ ray of 60Co is irradiating by acute angle. We have accepted the scattered γ ray photons both in the acute and large scattering angles, and we give out a linear relation exists between the counting numbers of the scattering γ rays and the thickness of the paraffin. The experimental result implies that the result of the small angle scattering method better than the result of the large scattering angle method.