PoS - Proceedings of Science
Volume 419 - FAIR next generation scientists - 7th Edition Workshop (FAIRness2022) - Main session
X-ray spectroscopy of few-electron uranium ions for tests of QED
L. Duval*, R. Loetzsch, H. Beyer, D. Banaś, P. Dergham, J. Glorius, R.E. Grisenti, M. Guerra, A. Gumberidze, P.M. Hillenbrand, P. Jagodziński, E. Lamour, Y. Litvinov, J. Machado, G. Paulus, N. Paul, N. Petridis, J.P. Santos, M. Scheidel, R.S. Sidhu, U. Spillmann, S. Steydli, K. Szary, S. Trotsenko, I. Uschmann, G. Weber, T. Stöhlker, P. Indelicato and M. Trassinelliet al. (click to show)
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Published on: June 19, 2023
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.
DOI: https://doi.org/10.22323/1.419.0012
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