Spatial and temporal evolution of ionic fragments produced by deep core-level ionization
Travnikova, Oksana; Liu, Ji-Cai; Püttner, Ralph; Jänkälä, Kari; Sisourat, Nicolas; Marchenko, Tatiana; Guillemin, Renaud; Céolin, Denis; Piancastelli, Maria Novella; Gel'mukhanov, Faris; Simon, Marc; Kimberg, Victor (2026-01-23)
American physical society
23.01.2026
Travnikova, O., Liu, J.-C., Püttner, R., Jänkälä, K., Sisourat, N., Marchenko, T., Guillemin, R., Céolin, D., Piancastelli, M. N., Gel’mukhanov, F., Simon, M., & Kimberg, V. (2026). Spatial and temporal evolution of ionic fragments produced by deep core-level ionization. Physical Review A, 113(1), 012823. https://doi.org/10.1103/6bdq-fwrd
https://creativecommons.org/licenses/by/4.0/
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by Bibsam.
https://creativecommons.org/licenses/by/4.0/
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by Bibsam.
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202602051599
https://urn.fi/URN:NBN:fi:oulu-202602051599
Tiivistelmä
Abstract
Multiply charged molecules fragment under Coulomb repulsion, leaving characteristic fingerprints in ensuing electronic decay. Using K-shell ionization of HCl as a benchmark, we identify metastable intermediates that persist to internuclear separations beyond 100 a.u., where weakened Coulomb interactions enable the emergence of narrow atomic lines, while short-lived states decay at smaller separations, producing broad, red-shifted backgrounds. This work provides a previously missing dynamical description of coupled electronic and nuclear evolution in the Coulomb fragmentation regime.
Multiply charged molecules fragment under Coulomb repulsion, leaving characteristic fingerprints in ensuing electronic decay. Using K-shell ionization of HCl as a benchmark, we identify metastable intermediates that persist to internuclear separations beyond 100 a.u., where weakened Coulomb interactions enable the emergence of narrow atomic lines, while short-lived states decay at smaller separations, producing broad, red-shifted backgrounds. This work provides a previously missing dynamical description of coupled electronic and nuclear evolution in the Coulomb fragmentation regime.
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