Coster-Kronig yields in silver measured with synchrotron radiation

The Coster-Kronig transition probabilities $f_{\mathrm{ij}}$ for shifting a vacancy from the $L_i$ to the $L_j$ subshell of Ag have been measured by differential photoionization of the subshells with synchrotron radiation by observing the intensity of the ensuing $L_j$-$M_4$,5${\mathrm{M}}_4$,5 Auger transitions. In the course of the analysis, spectator satellites in these Auger spectra were identified. The following Ag Coster-Kronig yields were determined: $f_{23}$=0.16±0.03, $f_{12}$=0.044±0.004, and $f_{13}$=0.61±0.05. While $f_{23}$ agrees very well with relativistic independent-particle calculations by Chen et al. [Phys. Rev. A 24, 117 (1981)], $f_{12}$ and $f_{13}$ fall below predictions by 35% and 18%, respectively, in qualitative accord with expected many-body effects.