MULTI-STEP POST-COLLISION INTERACTION EFFECTS IN Kr K-SHELL PHOTOIONIZATION
T. Hayaishi*, Y. Fujita*, M. Izumisawa*, T. Tanaka**, E. Murakami#, E. 
Shigemasa##, A. Yagishita## and Y. Morioka**
*Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 
305-8573, Japan
#Department of Physics, Chiba Institute of Technology, Narashino, Chiba 
275-0023, Japan
**Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, 
Japan
#Photon Factory, National Laboratory for High Energy Physics, Tsukuba 
305-0801, Japan
Yield spectra of multiply charged ions produced by Auger cascades following 
Kr K-shell photoionization have been measured by a threshold 
photoelectron-ion coincidence technique. These observed yield spectra exhibit 
characteristic profiles of multi-step post-collision interaction effects 
induced by the Auger cascades.