Isomer-dependent fragmentation dynamics of inner-shell photoionized difluoroiodobenzene

• DOI: 10.1039/c7cp01379e
• Publication Date: 2017-05-11T14:54:31Z
• Authors: Utuq Ablikim; Cédric Bomme; Evgeny Savelyev; Hui Xiong; Rajesh Kushawaha; Rebecca Boll; Kasra Amini; Timur Osipov; David Kilcoyne; Artem Rudenko; Nora Berrah; Daniel Rolles
• Keywords: Fragmentation; Coulomb explosion

The fragmentation dynamics of 2,6- and 3,5-difluoroiodobenzene after iodine 4d inner-shell photoionization with soft X-rays are studied using coincident electron ion momentum imaging. By analyzing the correlation between fluorine cations in three-fold coincidence events, we can distinguish two isomers experimentally. Classical Coulomb explosion simulations overall agreement experimentally determined fragment kinetic energies correlations point toward different mechanisms time scales. While most three-body channels show clear evidence for sequential on a scale larger than rotational period fragments, breakup into third charged co-fragment appears to occur within several hundred femtoseconds.