Open AccessPhotoelectron Spectroscopy of Liquid Water with Tunable Extreme-Ultraviolet Radiation: Effects of Electron Scattering
Author(s) -
Conaill Perry,
Inga Jordan,
Pengju Zhang,
Aaron von Conta,
Fernanda Brandalise Nunes,
Hans Jakob Wörner
Publication year - 2021
Publication title -
the journal of physical chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.563
H-Index - 203
ISSN - 1948-7185
DOI - 10.1021/acs.jpclett.0c03424
Subject(s) - extreme ultraviolet , atomic physics , ionization , electron , x ray photoelectron spectroscopy , photon energy , radiation , photon , kinetic energy , spectroscopy , ultraviolet , scattering , valence (chemistry) , ultraviolet photoelectron spectroscopy , ionization energy , photoemission spectroscopy , materials science , chemistry , physics , optics , optoelectronics , nuclear magnetic resonance , nuclear physics , laser , ion , organic chemistry , quantum mechanics
We report the first systematic photoelectron measurements of the three outer-valence bands of liquid water as a function of the ionizing photon energy in the near-threshold region. We use extreme-ultraviolet (XUV) radiation tunable between ∼17.1 and 35.6 eV, obtained through monochromatization of a high-harmonic source. We show that the absolute values of the apparent vertical ionization energies and their respective peak widths show a decreasing trend of their magnitudes with increasing photon energy close to the ionization threshold. We find that the observed effects do not only depend on the electron kinetic energy but are also different for the various outer-valence bands. These observations are consistent with, but not fully explained by, the effects of inelastic electron scattering.