@article{oai:repo.qst.go.jp:00079957,
 author = {Kosugi, S and Koike, F and Iizawa, M and Oura, M and Gejo, T and Tamasaku, K and Harries, James and Guillemin, R and N Piancastelli, M and Simon, M and Harries, James},
 issue = {18},
 journal = {Physical Review Letters},
 month = {May},
 note = {Differences in postcollision interaction (PCI) effects on Kr L3M4,5M4,5 Auger electron spectra were observed, depending on whether the initial photoionization occurred slightly above the K threshold or slightly above the L3 threshold. For the former, KL fluorescence emission most likely happens and then Auger processes due to the L3 hole follow. The time delay due to fluorescence causes a reduced shift of the Auger peak and tailing toward lower energy, since the Auger overtaking of the photoelectron happens later in time and at a location farther away from the ionic core, compared to the case for the simple one-step L3M4,5M4,5 Auger decay after L-shell photoionization. Time-dependent theory for PCI in multistep processes agrees well with experiment, illustrating the effect as an internal clock for the time-sequence of the dynamical process.},
 title = {Fluorescence Time Delay in Multistep Auger Decay as an Internal Clock},
 volume = {124},
 year = {2020}
}