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77 papers · 1 filter
Commissioning of a fast fine-step electron-energy-scan system for electron-ion crossed-beams experiments
B. Michel Döhring, Alexander Borovik, Kurt Huber +2
We report on the commissioning of a fast electron-energy scan system for measurements of electron-impact ionization cross sections. The Giessen crossed-beams experiment employs a h…
A cryogenic Paul trap for probing the nuclear isomeric excited state Th
Daniel Moritz, Kevin Scharl, Markus Wiesinger +16
While laser excitation of the nuclear isomeric transition in Th has been recently achieved for thorium atoms embedded in large-bandgap crystals, laser excitation and charac…
Electron-ion collision spectroscopy at the CRYRING@ESR electron cooler
C. Brandau, S. Fuchs, V. Hannen +7
Electron-ion collision spectroscopy at heavy-ion storage rings aims at precision measurements of resonance features that occur in the cross sections of electron collision processes…
Testing strong-field QED to second-order in the highly correlated atomic system berylliumlike Pb78+ by electron-ion recombination spectroscopy
S. Schippers, C. Brandau, S. Fuchs +33
A low-energy storage ring with an ultracold electron cooler has been coupled with a heavy-ion accelerator facilitating high-resolution electron-ion collision spectroscopy of the he…
Double--hole resonances in single photoionization of He-like B ions
A. Müller, P. -M. Hillenbrand, S. -X. Wang +8
Within a joint experimental and theoretical research project, single photoionization of He-like B ions was investigated in the energy range from approximately 250 to 1200~eV…
Dissociative recombination of rotationally cold ArH
Ábel Kálosi, Manfred Grieser, Leonard W. Isberner +11
We have experimentally studied dissociative recombination (DR) of electronically and vibrationally relaxed ArH in its lowest rotational levels, using an electron--ion merged-be…