Coster-Kronig, fluorescence, and Auger yields of the Ag-47 L subshells measured through synchrotron photoionization

The decay of individual L subshell vacancies in,Ag has been investigated th rough selective photoionization by monochromatized synchrotron radiation. B y tuning the radiation energy over the L edges, the ionization of particula r subshells can be turned off and on. The corresponding subshell ionization cross sections including the subtle structure caused by electron correlati ons are known from our previous studies. The x-ray fluorescence emitted in the vacancy decay was recorded by a Si (Li) detector. Advanced fitting tech niques were employed to extract the intensities of lines originating from d ifferent subshells. The extracted line intensities were plotted versus ener gy of the primary radiation. The relative jumps of the line intensities occ urring at the edges directly correspond to the Coster-Kronig yields, wherea s the absolute values of the total subshell fluorescence give the fluoresce nce yields. The following Coster-Kronig yields were obtained: f(12) = 0.14( 3), f(13) = 0.58(5), and f(23) = 0.18(3). Adopting the value omega(3) = 0.0 56(7) from literature, the following fluorescence yields are obtained: omeg a(1) = 0.013(2) and omega(2) = 0.067(9). The results agree reasonably with theoretical calculations. In particular, the rather large value of f(13) in dicates that the L-1-L3M4,5 Coster-Kronig channel is well allowed. [S1050-2 937(99)05005-2].