@article{037170fdc88b4bec96bdae24b76b3144,
title = "X-ray spectroscopy of few-electron uranium ions for tests of QED",
abstract = "We present a here a non-parametric analysis of x-ray spectra for experiment E125 performed at GSI-FAIR in Darmstadt. This experiment measured intra-shell transitions of highly charged uranium with a twin-arm Bragg spectrometer equipped with x-rays CCDs. The method consists in slicing the CCD image and calculating the centroids of the lines, then adjusting the slice size in order to remove background. Due to the low count rate, we reveal the limitations of this method which provides an accuracy of only a few pixels, far from the sub-pixel requirement.",
author = "L. Duval and R. Loetzsch and H. Beyer and D. Bana{\'s} and P. Dergham and J. Glorius and Grisenti, {R. E.} and M. Guerra and A. Gumberidze and Hillenbrand, {P. M.} and P. Jagodzi{\'n}ski and E. Lamour and Y. Litvinov and J. Machado and G. Paulus and N. Paul and N. Petridis and Santos, {J. P.} and M. Scheidel and Sidhu, {R. S.} and U. Spillmann and S. Steydli and K. Szary and S. Trotsenko and I. Uschmann and G. Weber and T. St{\"o}hlker and P. Indelicato and M. Trassinelli",
note = "Funding Information: The results presented here are based on the experiment E125, which was performed at the infrastructure ESR at the GSI Helmholtzzentrum f{\"u}r Schwerionenforschung, Darmstadt (Germany) in the frame of FAIR Phase-0. This work has been supported by the European Union{\textquoteright}s Horizon 2020 research and innovation programme und grant agreement n° 6544002. M.T. thanks in addition the ExtreMe Matter Institute and Alexander von Humboldt Foundation for their support for the stays at the GSI for the preparation and data acquisition. We acknowledge substantial support by ErUM-FSP APPA (BMBF n° 05P19SJFAA). P. J. acknowledges funding support from National Science Centre, Poland, grant number DEC-2022/06/X/ST2/00453. L. D. acknowledges funding support from the Initiative Physique des Infinis (IPI), a research training program of the Idex SUPER at Sorbonne Universit{\'e} Publisher Copyright: {\textcopyright} Copyright owned by the author(s).; 7th Edition Workshop on FAIR Next Generation Scientists, FAIRness 2022 ; Conference date: 23-05-2022 Through 27-05-2022",
year = "2023",
month = jun,
day = "19",
doi = "10.22323/1.419.0012",
language = "English",
volume = "419",
journal = "Proceedings of Science",
issn = "1824-8039",
publisher = "Sissa Medialab Srl",
}