Experimental L x-ray fluorescence cross-sections for elements with 45 <= Z <= 50 at 7 keV by synchrotron radiation photo ionization

摘要

L x-ray fluorescence cross-sections for elements with 45 &LE; Z &LE; 50 were measured at 7 keV using synchrotron radiation photoionization. The experimental set-up provided a linearly polarized monoenergetic photon beam producing a low background and improving the signal-to-noise ratio. The data obtained for the L lines, L-I, Lα, Lβ(I), Lβ(II), Lγ(I) and Lγ(II), were grouped considering the transition scheme, the energies of the emission lines and the detector resolution. Results for the experimental cross-sections obtained were compared with theoretical values using two different data tables. In general, it was found that the experimental fluorescence cross-sections are slightly higher (7-10%) than the theoretically calculated data and in some cases these differences are up to 40%. Copyright © 2005 John Wiley & Sons, Ltd.