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 s hape or the form and/or the thickness. Generally the neutron transmiss ion 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 cros s section Sigma of a material is estimated from the gradient of the li ne measured by the thickness for 90% neutron attenuation, In the metho d presented in this paper, the thickness could be obtained from a curv e in a linear (Y)-log(X) graph. This paper describes an experimental m ethod to measure the macroscopic cross section for various materials u sing neutron radioscopy. Measured Sigma values were relatively adequat e compared to reference values.