Assessment of neutron capture γ-ray analysis

Abstract

Analysis by the measurement of thermal neutron capture gamma rays is described, and the technique compared with other non-destructive nuclear methods for the elements of interest. The accuracy attainable in the analysis of practical samples has been examined and shown to be strongly dependent on the extent of matrix interferences. In favourable cases an accuracy of ±1% is attainable. The sensitivity of the technique is limited by the neutron absorption cross section of the element of interest. With the apparatus described boron and rare earths can be determined in trace quantities, whilst hydrogen can only be determined in the percentage range.