Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 31: Poster Session III
A 31.22: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG1
High-resolution studies of resonant photorecombination with an electron beam ion trap — •Chintan Shah1, Leticia Täubert1, Julia Jäger1, Sven Bernitt1,2, and José Ramón Crespo López-Urrutia1 — 1Max-Plank-Institut für Kernphysik, Heidelberg, Germany — 2Friedrich-Schiller-Universität Jena, Jena, Germany
Dielectronic recombination, the fundamental process where a free electron is captured by the highly charged ion and its kinetic energy is transferred to excite a bound electron, has been intensively investigated due to its interest for fundamental atomic physics and the diagnostic of astrophysical and laboratory plasmas. Besides DR, higher-order resonant photorecombination processes such as trielectronic or quadruelectronic recombination are also relevant, where two or three bound electrons can be simultaneously excited by the capture of a free electron. Significant contributions of trielectronic or quadruelectronic recombination to the total recombination rates make it necessary to consider these processes in the modeling of ionization balance and cooling rate of hot plasmas [1]. Here we present the measurements of these processes with K-shell excitation of iron ions, carried out in an electron beam ion trap.[1] C. Shah et al., PRE 93, 061201(R) (2016)