The influence of the binding energy on Compton-scattering-driven ionization
Abstract
We present a comprehensive study of Compton scattering of 20 keV photons by bound electrons over a wide range of binding energies (Ne 2p, Ne 2s, C 1s, O 1s, and Ne 1s orbitals). In particular, we have measured fully differential cross sections, i.e., electron angular distributions with respect to the direction of the photon momentum transfer for fixed electron energy. Our data show strong deviations from the predictions of the ''quasi-free'' electron approximation. The binding energy and the shape of the Coulomb potential from which the electron escapes both play a significant role in its kinematics. We find that Compton electrons are scattered and even back-reflected by the ionic potential. The strength of this effect depends on the orbital from which the electron is ejected.
Versions
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BibTeX
@misc{melzer2026influence,
title = {{The influence of the binding energy on Compton-scattering-driven ionization}},
author = {N. Melzer and M. Kircher and G. Kastirke and J. Rist and D. Tsitsonis and A. Pier and L. Kaiser and J. Kruse and N. Anders and J. Stindl and L. Sommerlad and O. D. McGinnis and M. Schmidt and L. Nowak and A. Kügler and I. Dwojak and P. Daum and P. Roth and M. Astaschov and J. Drnec and K. Lin and N. Wong and F. Trinter and M. S. Schöffler and L. Ph. H. Schmidt and D. M. Haubenreißer and N. M. Novikovskiy and N. Diehl and Ph. V. Demekhin and S. Brennecke and M. Lein and S. Eckart and T. Jahnke and R. Dörner},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.06242},
eprint = {2610.06242},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.06242},
}
RIS
TY - UNPB
TI - The influence of the binding energy on Compton-scattering-driven ionization
AU - N. Melzer
AU - M. Kircher
AU - G. Kastirke
AU - J. Rist
AU - D. Tsitsonis
AU - A. Pier
AU - L. Kaiser
AU - J. Kruse
AU - N. Anders
AU - J. Stindl
AU - L. Sommerlad
AU - O. D. McGinnis
AU - M. Schmidt
AU - L. Nowak
AU - A. Kügler
AU - I. Dwojak
AU - P. Daum
AU - P. Roth
AU - M. Astaschov
AU - J. Drnec
AU - K. Lin
AU - N. Wong
AU - F. Trinter
AU - M. S. Schöffler
AU - L. Ph. H. Schmidt
AU - D. M. Haubenreißer
AU - N. M. Novikovskiy
AU - N. Diehl
AU - Ph. V. Demekhin
AU - S. Brennecke
AU - M. Lein
AU - S. Eckart
AU - T. Jahnke
AU - R. Dörner
PY - 2026
DA - 2026/10/05
PB - arXiv
DO - 10.48550/arxiv.2610.06242
UR - https://arxiv.org/abs/2610.06242
AB - We present a comprehensive study of Compton scattering of 20 keV photons by bound electrons over a wide range of binding energies (Ne 2p, Ne 2s, C 1s, O 1s, and Ne 1s orbitals). In particular, we have measured fully differential cross sections, i.e., electron angular distributions with respect to the direction of the photon momentum transfer for fixed electron energy. Our data show strong deviations from the predictions of the ''quasi-free'' electron approximation. The binding energy and the shape of the Coulomb potential from which the electron escapes both play a significant role in its kinematics. We find that Compton electrons are scattered and even back-reflected by the ionic potential. The strength of this effect depends on the orbital from which the electron is ejected.
ER -