Title:
Single and multiple excitations in double-core-hole states of free water molecules
Author(s):
Marchenko, T.; Carniato, S.; Goldsztejn, G.; Travnikova, O.; Journel, L.; Guillemin, R.; Ismail, I.; Koulentianos, D.; Martins, J.; Céolin, D.; Püttner, Ralph; Piancastelli, M. N.; Simon, M.
Year of publication:
2020
Available Date:
2021-03-26T11:51:11Z
Abstract:
We present a combined experimental and theoretical study of the double-core-hole photoelectron spectrum obtained in isolated water molecules irradiated with hard x-rays above the oxygen K−2 threshold. States of the type O K−2V and multiply excited states are created by single-photon absorption and subsequent one-electron emission. A detailed analysis enabled by high experimental resolution reveals dissociative nuclear dynamics in the K−2V pre-edge states. At the binding energies above the K−2 double-ionization potential, a complex spectral pattern is observed and attributed to highly excited states involving multiple shake-up excitation processes with the aid of state-of-the-art theoretical calculations. A strong broadening due to the nuclear motion indicates a highly dissociative nature of these multiply excited states, in agreement with the theoretical analysis.
Part of Identifier:
e-ISSN (online): 0953-4075
Keywords:
water
double-corehole
dissociation dynamics
shake-up processes
HAXPES
hard x-rays
electron spectroscopy
DDC-Classification:
530 Physik
Publication Type:
Wissenschaftlicher Artikel
URL of the Original Publication:
DOI of the Original Publication:
Journaltitle:
Journal of Physics B: Atomic, Molecular and Optical Physics
Publisher Place:
Bristol, London
Department/institution:
Physik
Institut für Experimentalphysik
Comments:
This is the version of the article before peer review or editing, as submitted by an author to Journal of Physics B: Atomic, Molecular and Optical Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-6455/abbe29