Ion-ion coincidence studies on multiple ionizations of N2 and O2 molecules irradiated by EUV free-electron laser at SPring-8

Abstract

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.