Experimental determination of the gadolinium L subshells fluorescence yields and <scp>Coster‐Kronig</scp> transition probabilities

The L subshell Coster-Kronig (CK) transition factors of Gd have been experimentally determined by means two different experimental approaches and compared to available literature data. On the one hand, reference-free X-ray fluorescence (XRF) analysis using an energy-dispersive detector was applied. This method permitted in addition determine yields since absolute incident emitted photon flux can be determined. other a wavelength-dispersive spectrometer based on modified von Hamos geometry full cylinder highly annealed pyrolithic graphite crystal used for validation CK independent experiment. use this high energy resolution allowed thanks capability better discriminate emission lines validate XRF results. For both experiments, calibrated instrumentation enabled provision reliable uncertainty budget results obtained.