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The following article is Open access
Ion-ion coincidence studies on multiple ionizations of N2 and O2 molecules irradiated by EUV free-electron laser at SPring-8
H Fukuzawa1,2, X-J Liu1,2, L Foucar1,2,3, M Kurka1,2,4, G Prümper1,2, M Okunishi1, K Ueda1,2, K Motomura2,5, N Saito2,5, H Iwayama2,6, K Nagaya2,6, H Murakami2,6, A Sugishima2,6, M Yao2,6, A Rudenko2,4,7, K U Kühnel2,7, J Ullrich2,4,7, R Feifel2,8, A Czasch3, R Dörner3, A Belkacem9, M Nagasono2, A Higashiya2, M Yabashi2, T Togashi2, T Ishikawa2, H Ohashi10 and H Kimura10
We investigated multiple ionizations of N2 and O2 molecules by 51 nm EUV-FEL at the SPring-8 Compact SASE Source Test Accelerator in Japan using ion–ion coincidence spectroscopy. Coulomb break-up of parent ions with charge states up to four (N24+ → N2+–N2+) or five (O25+ → O3+–O2+) is found.