University of Oulu

Boudjemia, N., Jänkälä, K., Püttner, R., Marchenko, T., Travnikova, O., Guillemin, R., Journel, L., Ismail, I., Koulentianos, D., Kosugi, S., Azuma, Y., Patanen, M., Huttula, M., Céolin, D., Piancastelli, M. N., & Simon, M. (2020). Electron spectroscopy and dynamics of HBr around the Br 1s−1 threshold. Physical Chemistry Chemical Physics, 22(46), 26806–26818.

Electron spectroscopy and dynamics of HBr around the Br 1s⁻¹ threshold

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Author: Boudjemia, Nacer1; Jänkälä, Kari1; Püttner, Ralph2;
Organizations: 1Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
2Fachbereich Physik Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
3Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005, Paris, France
4Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvettes Cedex, France
5Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96 Gothenburg, Sweden
6Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
7Department of Physics, Tokyo Gakugei University, 4-1-1 Nukuikita-machi, Koganei, Tokyo 184-8501, Japan
8Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.1 MB)
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Language: English
Published: Royal Society of Chemistry, 2020
Publish Date: 2020-12-09


A comprehensive electron spectroscopic study combined with partial electron yield measurements around the Br 1s ionization threshold of HBr at ≅13.482 keV is reported. In detail, the Br 1s⁻¹ X-ray absorption spectrum, the 1s⁻¹ photoelectron spectrum as well as the normal and resonant KLL Auger spectra are presented. Moreover, the L-shell Auger spectra measured with photon energies below and above the Br 1s⁻¹ ionization energy as well as on top of the Br 1s⁻¹σ* resonance are shown. The latter two Auger spectra represent the second step of the decay cascade subsequent to producing a Br 1s⁻¹ core hole. The measurements provide information on the electron and nuclear dynamics of deep core-excited states of HBr on the femtosecond timescale. From the different spectra the lifetime broadening of the Br 1s⁻¹ single core-hole state as well as of the Br(2s⁻²,2s⁻¹2p⁻¹,2p⁻²) double core-hole states are extracted and discussed. The slope of the strongly dissociative HBr 2p⁻²σ* potential energy curve is found to be about −13.60 eV Å⁻¹. The interpretation of the experimental data, and in particular the assignment of the spectral features in the KLL and L-shell Auger spectra, is supported by relativistic calculations for HBr molecule and atomic Br.

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Series: PCCP. Physical chemistry chemical physics
ISSN: 1463-9076
ISSN-E: 1463-9084
ISSN-L: 1463-9076
Volume: 22
Issue: 46
Pages: 26806 - 26818
Article number: 053405
DOI: 10.1039/D0CP04787B
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: This project has received funding from the European Unions's Horizon 2020 research and innovation programme under Marie Skoldowska-Curie agreement no. 713606. Academy of Finland is acknowledged for funding.
EU Grant Number: (713606) I4FUTURE - Novel Imaging and Characterisation Methods in Bio, Medical, and Environmental Research and Technology Innovations
Copyright information: This journal is © the Owner Societies 2020. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.