Determination of²³⁵U abundance in uranium by neutron activation on the basis of the molybdenum fission interference

The purpose of the present paper is to suggest a method for determining the U-235 abundance in uranium samples (compounds, metallic alloys or other uranium materials, where this element may be natural or not) through a particular application of neutron activation analysis, based on the Fission interference by molybdenum. The method lies on an a priori calibration with natural uranium, thus it does not require U-235 certified standards.