SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster II
A 20.17: Poster
Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof
Dielectronic recombination in He-like oxygen ions investigated at CRYRING@ESR — •Weronika Biela-Nowaczyk1, Pedro Amaro2, Carsten Brandau1,3, Sebastian Fuchs3,4, Filipe Grilo2, Michael Lestinsky1, Esther B. Menz1,5, Stefan Schippers3,4, Thomas Stöhlker1,5,6, and Andrzej Warczak7 — 1GSI Darmstadt — 2LIBPhys-UNL, NOVA Univ. Lisbon — 3JLU Gießen — 4HFHF Campus Gießen — 5HI Jena — 6FSU Jena — 7JU Kraków
Multielectron resonant processes like dielectronic recombination (DR) and trielectronic recombination (TR) are governed by the electron-electron interaction and are of great importance in plasmas. These processes are major cooling factors in plasmas and, therefore, especially affect the dynamics of astrophysical objects. A program for DR experiments was started at the low-energy heavy-ion storage ring CRYRING@ESR. One of the first species studied was O6+. As oxygen is one of the most abundant elements in the universe experimental data are of particular importance. The stored ion beam is collinearly merged with the ultra-cold electron beam of the cooler, leading to electron-ion interactions. In our experiment, the resonant condition for dielectronic capture was achieved by detuning the electron energy. The signatures of recombination were O5+ product ions, which were directed onto a particle detector and counted with near-unity efficiency. We will discuss the experimental method and show preliminary results of our analysis.