Measurement of L X-ray cross-sections and relative intensities of heavy elements by 15.2 keV photons
نویسندگان
چکیده
Total L X-ray fluorescence cross-sections have been measured for the elements La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb and Lu using a photon energy of 15.2 keV. The measurements have been performed using an annular source of Am. The obtained cross-sections were then compared with the theoretical values evaluated using semi-empirically fitted values of L-subshell fluorescence yields and Coster–Kronig transition probabilities based on relativistic Dirac–Hartree–Slater theory. Good agreement was observed between the experimental and theoretical values. Relative intensities ILb=ILa and ILg=ILa have been also measured for the same elements. The accuracy of the measurements varies up to 6% (except for the Lg Xray line around 8%). r 2004 Elsevier Ltd. All rights reserved. PACS: 32.30.Rj; 78.70 En
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