An experimental method for macroscopic cross section measurements using neutron radioscopy

Neutron radioscopic images of high quality could be recently used for the quantitative measurements such as the length, the dimension, the shape or the form and/or the thickness. Generally the neutron transmission curve is expressed by a straight line in a graph of the Y-axis on a log scale and the X-axis on a linear scale, and the macroscopic cross section Σ of a material is estimated from the gradient of the line measured by the thickness for 90% neutron attenuation. In the method presented in this paper, the thickness could be obtained from a curve in a linear (Y)-log(X) graph. This paper describes an experimental method to measure the macroscopic cross section for various materials using neutron radioscopy. Measured Σ values were relatively adequate compared to reference values. (orig.)