Open AccessUsing photoelectron spectroscopy to measure resonant inelastic X‐ray scattering: a computational investigation
Author(s) -
Higley Daniel J.,
Ogasawara Hirohito,
Zohar Sioan,
Dakovski Georgi L.
Publication year - 2022
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577521011917
Subject(s) - spectrometer , resonant inelastic x ray scattering , physics , deconvolution , scattering , inelastic scattering , electron , spectral resolution , fermi gamma ray space telescope , full width at half maximum , optics , atomic physics , spectral line , computational physics , inelastic neutron scattering , nuclear physics , astronomy , quantum mechanics
Resonant inelastic X‐ray scattering (RIXS) has become an important scientific tool. Nonetheless, conventional high‐resolution (few hundred meV or less) RIXS measurements, especially in the soft X‐ray range, require low‐throughput grating spectrometers, which limits measurement accuracy. Here, the performance of a different method for measuring RIXS, i.e. photoelectron spectrometry for analysis of X‐rays (PAX), is computationally investigated. This method transforms the X‐ray measurement problem of RIXS to an electron measurement problem, enabling use of high‐throughput, compact electron spectrometers. X‐rays to be measured are incident on a converter material and the energy distribution of the resultant photoelectrons, the PAX spectrum, is measured with an electron spectrometer. A deconvolution algorithm for analysis of such PAX data is proposed. It is shown that the deconvolution algorithm works well on data recorded with ∼0.5 eV resolution. Additional simulations show the potential of PAX for estimation of RIXS features with smaller widths. For simulations using the 3 d levels of Ag as a converter material, and with 10 5 simulated detected electrons, it is estimated that features with a few hundred meV width can be accurately estimated in a model RIXS spectrum. For simulations using a sharp Fermi edge to encode RIXS spectra, it is estimated that one can accurately distinguish 100 meV FWHM peaks separated by 45 meV with 10 5 simulated detected electrons that were photoemitted from within 0.4 eV of the Fermi level.