Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 37: Poster – Highly Charged Ions and their Applications
A 37.8: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
High-precision synchrotron laser spectroscopy of highly charged O, N and C in an EBIT — •Jonas Danisch1, Marc Botz1, Moto Togawa1, Joschka Goes1, Chintan Shah1,3, Filipe Grilo1,4, Awad Mohamed2, Monica de Simone2, Marcello Coreno2, Thomas Pfeifer1, and José Crespo López-Urrutia1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2IOM-CNR, Trieste, Italy — 3NASA/Goddard Space Flight Center, Greenbelt, USA — 4LIBPhys, Lisbon, Portugal
Analysing X-ray observations from hot astrophysical plasmas depends on understanding the transitions of highly charged ions (HCI). In the absence of high-precision theoretical data for some HCIs, experimental studies on the ground are needed to obtain accurate data in order to benchmark and improve astrophysical models. To overcome this challenge in a laboratory environment, highly charged ions are generated and trapped with an electron beam ion trap (EBIT), while the ions are simultaneously excited with synchrotron radiation from a high-resolution beamline. The occurrence of photoexcitation can be observed using a silicon drift detector, while the process of photoionisation can be monitored using a time-of-flight measurement.
In this work we present the result at the Elettra synchrotron facility in Trieste, Italy for the investigation of line positions of N2+ − N4+ as well of O1+,O2+. Moreover we search for the small isotopic shift 16O - 18O present in the resonant photoionization of Be-like oxygen O4+ driven by the Kα transition 1s2 2s2 → 1s 2s2 2p3/2 and determined an experimental value of 2.56 ± 1.27 meV.
Keywords: Highly charged ions; Electron beam ion trap; Synchrotron; Spectroscopy; Laboratory astrophysics