Comparison of techniques for the determination of theL2−L3XCoster-Kronig transition probability

The value of the Coster-Kronig transition probability for $Z=73\mathrm{}$ has been determined by eight variations of the $K-L$ x-ray coincidence technique. The effect of a correction for unwanted $L\eta -K{\alpha }_2$ coincidence events in the $L\alpha -K$ coincidence spectrum is discussed. The value reported for the Coster-Kronig transition probability at $Z=73\mathrm{}$, $f_{23}=0.153\mathrm{}\pm 0.002$, is a weighted average of measurements not involving this correction. This value is in excellent agreement with previous measurements but deviates significantly from theoretical predictions.