Experimental determination of ruthenium L-shell fluorescence yields and Coster–Kronig transition probabilities

Abstract

Fluorescence yields and Coster–Kronig factors of the ruthenium L-shell are determined experimentally for the first time with reliable uncertainty budgets.

A novel and holistic approach for experimental x-ray fundamental parameter determination—the Ru L-shell

“…As stated earlier, they were obtained using N p = 12 and E max = 8 keV. For comparison, also the results of recently published data [28], which was evaluated according to the classical approach based on subsequent determination of sample specific subshell ionization cross sections, subshell fluorescence yields and CK-factors as presented in detail in [6]. Another big difference of these classical results to the present approach is the extent of the used experimental dataset, which was limited to an E max of 3.4 keV.…”

“…In the case of L 2 the observed discrepancy is larger than the uncertainty of our results. [28], selected data in common fundamental parameter compilations by Schoonjans et al [16] and Krause [14] as well as theoretically calculated factors by McGuire [29], Puri et al [30] and Xu and Rosato [31].…”

“…Employing the recorded fluorescence signals from the Ru-L shells and the determined fluorescence and CK yields, one can also calculate each subshell's sample specific photoionization cross section at the given excitation photon energy [13]. If the areal mass (ρd) of the sample is known, also the absolute cross sections [28], selected data in common fundamental parameter compilations by Schoonjans et al [16] and Krause [14] as well as theoretically calculated factors by McGuire [29] and Puri et al [30]. [32] and two datasets by Trzhaskovskaya et al [33,34] as well as constant jump ratio data from Elam et al [35].…”

“…Figure 5. Comparison of the derived subshell fluorescence yields for the Ru-L shells in comparison to recently published data employing the classical evaluation approach[28], selected data in common fundamental parameter compilations by Schoonjans et al[16] and Krause[14] as well as theoretically calculated factors by McGuire[29], Puri et al[30] and Xu and Rosato[31].…”