Chemical effects on K beta/K alpha X-ray intensity ratios of Mo, Ag, Cd, Ba, La, Ce compounds and total mass attenuation coefficients of Fe and Cu

The K beta /K alpha intensity ratios for pure Mo, Ag, Cd, Ba, La and Ce ele ments and for some of their compounds were investigated. The vacancies in t he K shell were created by 59.5-keV gamma -rays from a heavily filtered Am- 241 radioactive source. K X-rays were measured using a Si(Li) detector with a resolution of 155 eV at 5.9 keV. We observed chemical effects on K beta /K alpha intensity ratios of Mo, Ag, Cd, Ba, La and Cc compounds. Detailed interpretation of data obtained from X-ray transmission measurements usuall y depends on the assumption that the contribution of each element is additi ve. This assumption yields the mixture rule for X-ray attenuation coefficie nts which is valid if molecular and chemical effects are negligible. We mea sured the total mass attenuation coefficients of Fe and Cu in various compo unds. Self-absorption corrections were carried out on data for ligands in t he different compounds. Our values were compared with the theoretical value s for pure elements. (C) 2001 Elsevier Science B.V. All rights reserved.