Measurement of L subshell fluorescence yields for high-Z elements excited by 22.6 keV photons

The σL1, σL2 and σL3 subshell X-ray production cross sections for U, Th, Bi, Pb, Tl, Hg, Au, Pt, Os, W, Ta, Lu, Yb and Er have been measured at 22.6 keV incident photon energy. The measurements were performed using a 109Cd radioisotope as the photon source and a Si(Li) detector. Li subshell fluorescence yields ω1,ω2 and ω3 have been determined from the measured σL1, σL2 and σL3 subshell X-ray production cross sections. The measured Li subshell production cross sections and ωi fluorescence yields were compared with theoretical, the semi-empirical and recommended values.

► The ωi fluorescence yields (i=1,2,3) determined from the measured σLi cross sections. ► The measurements were performed using 109Cd radioisotope source and Si(Li) detector. ► In literature there are three different sets of the fluorescence ωi yields [7,10-12]. ► The fluorescence yields ωi were evaluated for the three sets. ► The sets were compared with each other.