2019/08/25 by Måns Wallner, J. H. D. Eland, Wallner, M. +19 · 1 citation
Engineering · Physics and Astronomy · #Atomic and Molecular Clusters (physics.atm-clus) #FOS: Physical sciences #Ion-surface interactions and analysis #Laser-Plasma Interactions and Diagnostics #Nuclear Physics and Applications
paper · pdf · doi:10.48550/arxiv.1908.09351
openalex publication_date 2019/08/25 · openalex created_date 2019/08/29 · openalex updated_date 2026/07/28
L-shell ionisation and subsequent Coulomb explosion of fully deuterated methyl iodide, CD3I, irradiated with hard x-rays has been examined by a time-of-flight multi-ion coincidence technique. The core vacancies relax efficiently by Auger cascades, leading to charge states up to 16+. The dynamics of the Coulomb explosion process are investigated by calculating the ions' flight times numerically based on a geometric model of the experimental apparatus, for comparison with the experimental data. A parametric model of the explosion, previously introduced for multi-photon induced Coulomb explosion, is applied in numerical simulations, giving good agreement with the experimental results for medium charge states. Deviations for higher charges suggest the need to include nuclear motion in a putatively more complete model. Detection efficiency corrections from the simulations are used to determine the true distributions of molecular charge state produced by initial L1, L2 and L3 ionisation.