Relativistic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi><mml:mo>−</mml:mo><mml:mi>L</mml:mi><mml:mi>L</mml:mi></mml:math>Auger spectra in the intermediate-coupling scheme with configuration interaction

Theoretical $K\ensuremath{-}LL$ Auger spectra have been calculated relativistically in intermediate coupling with configuration interaction. Results for 25 elements with $18\ensuremath{\le}Z\ensuremath{\le}96$ are listed and compared with experimental data. Relativistic effects are seen to be important above $Z\ensuremath{\simeq}35$. Intermediate coupling with configuration interaction is necessary to describe the spectra for $Z\ensuremath{\lesssim}60$; $j\ensuremath{-}j$ coupling results are adequate above $Z\ensuremath{\simeq}60$, except for the $\frac{K\ensuremath{-}{L}_{2}{L}_{2}(^{1}S_{0})}{K\ensuremath{-}{L}_{1}{L}_{1}(^{1}S_{0})}$ intensity ratio, which is very sensitive to correlation. The relative satellite intensity $\frac{K\ensuremath{-}{L}_{1}{L}_{2}(^{3}P_{0})}{(^{1}P_{1})}$ is found to be exceedingly sensitive to the effects of relativity; experimental data, though scant and uncertain, appear to disagree with this theoretical ratio. Otherwise, the present relativistic $K\ensuremath{-}LL$ spectra in intermediate coupling with configuration interaction agree well with experiment over the entire range of atomic numbers from $Z=18 \mathrm{to} 96$.

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