17.–20. Juli 2022
Haus Hainstein Eisenach
Europe/Berlin Zeitzone
HITRAP Workshop 2022
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Precision X-Ray Spectroscopy of He-like Uranium using Metallic Magnetic Calorimeters

19.07.2022, 09:55
25m
Luthersaal (Haus Hainstein Eisenach)

Luthersaal

Haus Hainstein Eisenach

Am Hainstein 16 99817 Eisenach
Talk Session 5

Sprecher

Philip Pfäfflein (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Beschreibung

Helium-like ions are the simplest atomic multibody systems and their study along the isoelectronic sequence provides a unique testing ground for the interplay of the effects of electron–electron correlation, relativity and quantum electrodynamics. However, for high-Z ions with nuclear charge Z > 54, where inner-shell transition energies reach up to 100 keV, there is currently no data available with high enough resolution and precision to challenge state-of-the-art theory [1]. In this context the recent development of metallic magnetic calorimeter (MMC) detectors is of particular importance. Their high spectral resolution of a few tens of eV FWHM at 100 keV incident photon energy in combination with a broad spectral acceptance down to a few keV will enable new types of precision x-ray studies [2].

We report on the first application of MMC detectors for high-resolution x-ray spectroscopy at the electron cooler of the low-energy storage ring CRYRING@ESR at GSI, Darmstadt. Within the presented experiment, the x-ray emission associated with radiative recombination of stored hydrogen-like uranium ions and cooler electrons was studied. Two MMC detectors developed within the SPARC collaboration [3] were placed at observation angles of 0° and 180° with respect to the ion beam axis. The detectors and their extraordinary capabilities for x-ray spectroscopy will bepresented. Special emphasis will be given to the achieved spectral resolution of better than 90 eV at x-ray energies close to 100 keV enabling for the first time to resolve the substructure of the Kαα1 and Kα2 lines.

References

[1] P. Beiersdorfer and G.V. Brown, Phys. Rev. A 91, 032514 (2015).
[2] S. Kraft-Bermuth et al., Atoms 2018, 59 (2018)
[3] D. Hengstler et al., Phys. Scr. 2015, 014054 (2015)

Hauptautor

Philip Pfäfflein (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Co-Autoren

Steffen Allgeier (Kirchhoff Institute for Physics(KIP)) Sonja Bernitt (HI Jena) Andreas Fleischmann (Uni Heidelberg) Herr Marvin Friedrich (Kirchhoff Institute for Physics(KIP)) Herr Christoph Hahn (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Daniel Hengstler (Kirchhoff Institute for Physics) Marc Oliver Herdrich (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Anton Kalinin (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Felix Kröger (FSU Jena, IOQ Jena, HI Jena) Frau Particia Kuntz (Kirchhoff Institute for Physics(KIP)) Michael Lestinsky (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Bastian Löher (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Esther Babette Menz (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Herr Tobias Over (FSU Jena, IOQ Jena, HI Jena) Uwe Spillmann (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Günter Weber (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Binghui Zhu (Helmholtz Institute Jena) Prof. Christian Enss (Kirchhoff Institute for Physics(KIP)) Thomas Stöhlker (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Präsentationsmaterialien

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