Ablikim, UtuqBomme, CédricXiong, HuiSavelyev, EvgenyObaid, RazibKaderiya, BalramAugustin, SvenSchnorr, KirstenDumitriu, IleanaOsipov, TimurBilodeau, RenéKilcoyne, DavidKumarappan, VinodRudenko, ArtemBerrah, NoraRolles, Daniel2023-12-072023-12-072016-12-02https://hdl.handle.net/2097/43972An experimental route to identify and separate geometric isomers by means of coincident Coulomb explosion imaging is presented, allowing isomer-resolved photoionization studies on isomerically mixed samples. We demonstrate the technique on cis/trans 1,2-dibromoethene (C2H2Br2). The momentum correlation between the bromine ions in a three-body fragmentation process induced by bromine 3d inner-shell photoionization is used to identify the cis and trans structures of the isomers. The experimentally determined momentum correlations and the isomer-resolved fragment-ion kinetic energies are matched closely by a classical Coulomb explosion model.Creative Commons Attribution 4.0 International Licensehttps://creativecommons.org/licenses/by/4.0/Text