High-Precision Transition Energy Measurements of Neonlike Fe XVII Ions
ORAL
Abstract
We improve eight-fold the energy accuracy of the strongest soft X-ray transitions of Fe XVII ions by resonantly exciting them in an electron beam ion trap with a monochromatic beam at the P04 beamline of the PETRA III synchrotron facility. By simultaneously tracking instantaneous photon-energy fluctuations with a high-resolution photoelectron spectrometer, we minimize systematic uncertainties down to velocity-equivalent ± ∼5 km/s in their rest energies, substantially improving our knowledge of this key astrophysical ion. Our large-scale configuration-interaction computations include more than four million configurations and agree with the experiment at a level without precedent for a ten-electron system. Thereby, theoretical uncertainties for interelectronic correlations become far smaller than those of quantum electrodynamics (QED) corrections. The present QED benchmark strengthens our trust in future calculations of many other complex atomic ions of interest to astrophysics, plasma physics, and for the development of optical clocks with highly charged ions.
*This research was funded by the Max Planck Society (MPG) and the German Federal Ministry of Education and Research (BMBF) under project 05K13SJ2. C.S. acknowledge supports from NASA under grant number 80GSFC21M0002 and MPG. F.S.P. and M.A.L. acknowledge support from the NASA Astrophysics Program. The theoretical work has been supported by the US NSF Grants No. PHY-2012068, PHY-2309254 and US Office of Naval Research Grant No. N00014-20-1-2513. Calculations were performed in part using the computing resources at the University of Delaware, in particular the Caviness and DARWIN high-performance computing clusters. M.S.S. thanks MPIK for hospitality. We thank DESY (Hamburg, Germany), a member of the Helmholtz Association HGF, for the provision of experimental facilities. Parts of this research were carried out at PETRA III. We thank the P04 team at PETRA III for their skillful and reliable work.
–
Publication:High-Precision Transition Energy Measurements of Neonlike Fe XVII Ions. https://arxiv.org/abs/2401.08395
Presenters
Charles Cheung
University of Delaware
Authors
Charles Cheung
University of Delaware
Chintan Shah
NASA Goddard Space Flight Center
Moto Togawa
Max-Planck-Institut fuer Kernphysik
Marc Botz
Max-Planck-Institut für Kernphysik
Jonas Danisch
Max-Planck-Institut für Kernphysik
Joschka J Goes
Max-Planck-Institut für Kernphysik
Sonja Bernitt
Max-Planck-Institut für Kernphysik
Marleen Maxton
Max-Planck-Institut für Kernphysik
Kai Böbnick
Max-Planck-Institut für Kernphysik
Jens Buck
Institut für Experimentelle und Angewandte Physik
Jörn Seltmann
Deutsches Elektronen-Synchrotron (DESY)
Moritz Hoesch
Deutsches Elektronen-Synchrotron (DESY)
Ming Feng Gu
Space Science Laboratory
F S Porter
NASA Goddard Space Flight Center
Thomas Pfeifer
Max-Planck-Inst Kernphys
Max-Planck-Institut für Kernphysik (MPIK) Heidelberg, Germany
