High-precision Transition Energy Measurements of Neon-like Fe <sc>xvii</sc> Ions

被引：5

作者：

Shah, Chintan ^{[1
,2
,3
]}

Togawa, Moto ^{[2
,4
,5
]}

Botz, Marc ^{[2
,5
]}

Danisch, Jonas ^{[2
]}

Goes, Joschka J. ^{[2
]}

Bernitt, Sonja ^{[2
,6
,7
,8
]}

Maxton, Marleen ^{[2
]}

Koebnick, Kai ^{[2
]}

Buck, Jens ^{[9
]}

Seltmann, Joern ^{[10
]}

Hoesch, Moritz ^{[10
]}

Gu, Ming Feng ^{[11
]}

Porter, F. Scott ^{[1
]}

Pfeifer, Thomas ^{[2
]}

Leutenegger, Maurice A. ^{[1
]}

Cheung, Charles ^{[12
]}

Safronova, Marianna S. ^{[12
]}

Crespo Lopez-Urrutia, Jose R. ^{[2
]}

机构：

[1] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[2] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[3] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, 1000 Hilltop Circle, Baltimore, MD 21250 USA

[4] European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany

[5] Heidelberg Univ, Heidelberg Grad Sch Fundamental Phys, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[6] GSI Helmholtzzentrum Schwerionenforschung, Planckstr 1, D-64291 Darmstadt, Germany

[7] Helmholtz Inst Jena, Frobelstieg 3, D-07743 Jena, Germany

[8] Friedrich Schiller Univ, Inst Opt & Quantenelektron, Max Wien Pl 1, D-07743 Jena, Germany

[9] Christian Albrechts Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany

[10] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[11] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[12] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

ASTROPHYSICAL JOURNAL | 2024年 / 969卷 / 01期

关键词：

X-RAY-SPECTRA; REFLECTION GRATING SPECTROMETER; LABORATORY MEASUREMENTS; LINE RATIO; CONFIGURATION-INTERACTION; RELATIVE INTENSITY; SATELLITE LINES; XVII; 2P-3S; EMISSION; DENSITY;

D O I：

10.3847/1538-4357/ad454b

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We improve by a factor of 4-20 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 10-15 meV, or velocity equivalent +/-similar to 5 km s(-1) in their rest energies, substantially improving our knowledge of this key astrophysical ion. Our large-scale configuration-interaction computations include more than 4 million relativistic configurations and agree with the experiment at a level without precedent for a 10-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 the development of optical clocks with highly charged ions.

引用

页数：12

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