Quantitative prompt gamma analysis using a focused cold neutron beam

We report the first quantitative results using a focused cold neutron beam for prompt gamma activation analysis (PGAA). We have measured the prompt ga mma signal from known Fe, Cr, Ti, B, and Cd specimens in the focusing geome try, from which we determine the sensitivities for these elements by the me thod of standard addition. Furthermore, we show results of measurements for homogeneous standard reference materials (boron in SRM 611 glass, and iron and chromium in a steel alloy SRM 160b) to verify the sensitivities determ ined. Finally, we present a position-dependent study of the Cr to Fe mass r atio in an industrial material, taking advantage of the narrowly focused be am. Existing problems for achieving routine quantitative analysis using the focused beam and suggestions for future directions are discussed.