1. Juni 2022 ONLINE ONLY
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Europe/Berlin Zeitzone

High-resolution measurements of the 1s(2s)^2 state decay branches in Li-like uranium

01.06.2022, 14:20
5m
690 1369 5599 / SPARC_Beam (Zoom)

690 1369 5599 / SPARC_Beam

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Sergiy Trotsenko (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Beschreibung

The proposed experiment is aiming at the first high-resolution measurement of the exotic, dipole allowed, "two-electron one-photon" decay (TEOP) of the 1s(2s)2 state in the heaviest Li-like ion (U89+). This transition is mediated by electron-electron correlation and in lithium-like uranium it is (surprisingly) expected to be the dominant decay mode. However, it is entwined with an M1 transition of very close transition energy. The use of high-resolution microcalorimeters will allow the separation of the two transitions and thus a clear identification of the TEOP decay. In addition, the relative decay rates can be measured for the first time, thus testing the corresponding theoretical predictions that differ considerably between different models. In addition to the radiative decay branches, the Auger decay channel will be measured as well, thus allowing for a complete measurement of all the decay channels of this particular quantum state.

Hauptautor

Sergiy Trotsenko (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI))

Co-Autoren

Alexandre Gumberidze (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Andreas Fleischmann (Uni Heidelberg) Daniel Hengstler (Kirchhoff Institute for Physics) Saskia Kraft-Bermuth (GSI, Darmstadt) Peter Egelhof (GSI, Darmstadt) Pascal Scholz (Universitaet Giessen) Dariusz Banas (Jan Kochanowski University) Heinrich Beyer (GSI, Darmstadt) Siegbert Hagmann (Goethe-Universität Frankfurt(UFfm-IKP)/GSI-Darmstadt) Pierre-Michel Hillenbrand (Justus-Liebig-Universität Giessen) Paul Indelicato (Laboratoire Kastler Brossel, Université Pierre et Marie Curie, CNRS, ENS) Christophor Kozhuharov (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Stephan Fritzsche Michael Lestinsky (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Renate Märtin (GSI, Darmstadt) Tino Morgenroth (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Uwe Spillmann (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Martino Trassinelli (Insitut des NanoSciences de Paris) Günter Weber (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Thomas Stöhlker (Friedrich-Schiller Universität Jena)

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