Time-and-energy resolved measurement of the cascaded Auger decay in krypton
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The cascaded Auger decay following ionization or excitation with 94 eV soft-X-ray pulses from the 3d subshell in krypton has been energy-and-time-resolved for the first time. The decay time of the 4s−14p−2nl → 4p−3 + e and/or 4s−14p−1nl → 4p−2 + e transition is measured to be 74 ± 20 fs. Furthermore, our data shows that the electrons with a kinetic energy around 25 eV (generally assigned as 3d−1np → 4s−2n′p + e) emitted after core excitation are emitted in a second decay step suggesting an alternative assignment of the form 4s−2np 4p−2 + e.
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