Distorted-Wave calculations of atomic ionization by bare ions and antiprotons
Abstract
We present \textit{ab initio} calculations of atomic ionization by bare ions and antiprotons within the continuum distorted-wave eikonal initial-state (CDW-EIS) model. The dataset covers atomic targets from H to Kr, impacted by bare ions over a broad range of projectile charges and by antiprotons. Particular attention is given to elements in periods 3 and 4 of the periodic table, which are relevant to pigment analysis and technologically important materials. The resulting subshell-resolved total ionization cross sections are made openly available through an online repository covering a broad range of projectile--target systems, occupied initial subshells, and projectile velocities. We analyze systematic trends in the cross sections, including their dependence on projectile charge and velocity, binding-energy scaling, and charge-sign effects in proton and antiproton impact. To extend the practical coverage of the database, we also develop a neural-network surrogate, CDWEIS-NN, trained on the subset of the database with projectile charge |ZP|≤ 8. The network interpolates the CDW-EIS results to additional projectile--target systems and impact energies, reproducing both held-out CDW-EIS calculations and the experimental benchmarks considered in this work with satisfactory accuracy.
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BibTeX
@misc{mitnik2026distortedwave,
title = {{Distorted-Wave calculations of atomic ionization by bare ions and antiprotons}},
author = {Darío M. Mitnik and Jorge E. Miraglia and Claudia. C Montanari},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.04059},
eprint = {2610.04059},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.04059},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Distorted-Wave calculations of atomic ionization by bare ions and antiprotons
AU - Darío M. Mitnik
AU - Jorge E. Miraglia
AU - Claudia. C Montanari
PY - 2026
DA - 2026/10/17
PB - arXiv
DO - 10.48550/arxiv.2610.04059
UR - https://arxiv.org/abs/2610.04059
AB - We present \textit{ab initio} calculations of atomic ionization by bare ions and antiprotons within the continuum distorted-wave eikonal initial-state (CDW-EIS) model. The dataset covers atomic targets from H to Kr, impacted by bare ions over a broad range of projectile charges and by antiprotons. Particular attention is given to elements in periods 3 and 4 of the periodic table, which are relevant to pigment analysis and technologically important materials. The resulting subshell-resolved total ionization cross sections are made openly available through an online repository covering a broad range of projectile--target systems, occupied initial subshells, and projectile velocities. We analyze systematic trends in the cross sections, including their dependence on projectile charge and velocity, binding-energy scaling, and charge-sign effects in proton and antiproton impact. To extend the practical coverage of the database, we also develop a neural-network surrogate, CDWEIS-NN, trained on the subset of the database with projectile charge |Z_P|≤ 8. The network interpolates the CDW-EIS results to additional projectile--target systems and impact energies, reproducing both held-out CDW-EIS calculations and the experimental benchmarks considered in this work with satisfactory accuracy.
ER -