Measurement of K alpha to L alpha and K beta to L beta intensity ratios ofseven elements in the atomic number range 56 <= Z <= 66 using photoionization at 59.54 keV

K alpha to L alpha and K beta to L beta intensity ratios for elements Ba, L a, Ce, Nd, Sm, Tb, and Dy have been measured at the excitation energy of 59 .54 keV gamma -rays from Am-241 radioactive source of strength 100 mCi. Int ensity ratios were determined by measuring K and L X-rays emitted from stan dard target of a given element. Theoretical values of the K alpha to L alph a and K beta to L beta intensity ratios were calculated using theoretically tabulated values of shell/subshell photoionization cross-sections, fluores cence yields, Coster-Kronig transition probabilities and radiative decay ra tes for eta (KLi) not equal 0 and eta (KLi) = 0. Experimental results were compared with the theoretical values. (C) 2001 Elsevier Science Ltd. All ri ghts reserved.