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Coulomb Explosion of CD3I induced by single photon deep inner shell ionisation

Journal article
Authors Måns Wallner
John H. D. Eland
Richard J. Squibb
Jonas Andersson
Andreas Hult Roos
Raj Singh
Omid Talaee
Dimitris Koulentianos
Maria Novella Piancastelli
Marc Simon
Raimund Feifel
Published in Scientific Reports
Volume 10
ISSN 2045-2322
Publication year 2020
Published at Department of Physics (GU)
Language en
Subject categories Atom and Molecular Physics and Optics


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 states produced by initial L1, L2 and L3 ionisation.

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