A Monte Carlo study of back-scattered gamma radiation from a broad beam normally incident on an infinitely thick slab

摘要

The method presented in this paper is an application of the Monte Carlo technique employed in calculating reflected radiation from a broad beam of gamma radiation normally incident on a plane and smooth surface. The reflecting medium is infinitely thick and homogeneous. It should be noted that the results of the calculation are almost 100 per cent accurate for thicknesses over 20 mean free paths#x2020;and for engineering purposes are useful between 10 and 20 mean free paths within a few per cent of accuracy.