Formation of multi-charged Kr ions through photoionization of 2p electrons studied with a coincidence technique

Multi-charged Kr ions have been measured using monochromatized undulator radiation combined with a coincidence technique. The coincidence measurements between multi-charged ions and energy-selected Auger electrons have clarified decay processes, as follows. The Auger final states formed through L3M45M45 decays turn significantly into Kr4+ and those through L3M23M45 decays generate Kr5+ mainly. The Auger decays of L3M23M23 types yield Kr6+ dominantly. These findings are consistent with the consideration on energy levels of Kr ions.