X-ray spectroscopy of few-electron uranium ions for tests of QED

Louis Duval (1, 2) , Robert Loetzsch (3, 4) , Heinrich F. Beyer (5) , Dariusz Banaś (6) , Perla Dergham (2) , Jan Glorius (7) , Robert Evaristo Grisenti (8, 7) , Mauro Guerra (9) , Alexandre Gumberidze (7) , Pierre-Michel Hillenbrand (10) , Pawel Jagodzinski (6) , Emily Lamour (2) , Yuri Litvinov (7) , Jorge Felizardo Dias Cunha Machado (9) , Gerhard G. Paulus (11) , Nancy Paul (1) , Nikolaos Petridis (7) , Jose Paulo Santos (9) , Marius Scheidel (7) , Ragandeep Singh Sidhu (7, 12, 8) , Uwe Spillmann (7) , Sébastien Steydli (2) , Karol Szari (6) , Sergiy Trotsenko (7) , Ingo Uschmann (13) , Günter Weber (3) , Thomas Stöhlker (14, 7, 3) , Paul Indelicato (1) , Martino Trassinelli (2, 15)

1 LKB (Jussieu) - Laboratoire Kastler Brossel
2 INSP - Institut des Nanosciences de Paris
3 Helmholtz-Institut Jena
4 Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany]
5 GSI - Gesellschaft für Schwerionenforschung
6 Jan Kochanowski University
7 GSI - GSI Helmholtzzentrum für Schwerionenforschung
8 Institut fur Kernphysik
9 LIBPhys-UNL - Laboratorio de Instrumentaçao, Engenharia Biomédica e Fisica da Radiaçao
10 Institut fur Kernphysik
11 Institut für Optik und Quantenelektronik
12 SUPA School of Physics and Astronomy [Edinburgh]
13 Institut für Optik und Quantenelektronik
14 IOQ - Institut fur Optik und Quantenelectronik
15 INSP-E10 - Agrégats et surfaces sous excitations intenses

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.

Mots clés: Highly-Charged Ions; QED; Atomic Spectroscopy; Uranium; Lamb shift

Domaines: Physique [physics]; Physique Atomique [physics.atom-ph]; Physique Quantique [quant-ph]

Louis Duval, Robert Loetzsch, Heinrich F. Beyer, Dariusz Banaś, Perla Dergham, et al.. X-ray spectroscopy of few-electron uranium ions for tests of QED. 2023. ⟨hal-04007983⟩