A new benchmark of soft X-ray transition energies of Ne , CO 2 , and SF 6 : paving a pathway towards ppm accuracy

Stierhof J, Kühn S, Winter M, Micke P, Steinbrügge R, Shah C, Hell N, Bissinger M, Hirsch M, Ballhausen R, Lang M, Gräfe C, Wipf S, Cumbee R, Betancourt-Martinez GL, Park S, Niskanen J, Chung M, Porter FS, Stöhlker T, Pfeifer T, Brown GV, Bernitt S, Hansmann P, Wilms J, Crepso López-Urrutia JR, Leutenegger MA (2022)

Publication Type: Journal article

Publication year: 2022

Journal

European Physical Journal D EDP Sciences: EPJ

Book Volume: 76

Article Number: 38

Journal Issue: 3

DOI: 10.1140/epjd/s10053-022-00355-0

Abstract

Abstract: A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We investigate the K-shell features of Ne , CO 2, and SF 6 gases, by measuring their photo ion-yield spectra at the BESSY II synchrotron facility simultaneously with the 1s–np fluorescence emission of He-like ions produced in the Polar-X EBIT. Accurate ab initio calculations of transitions in these ions provide the basis of the calibration. While the CO 2 result agrees well with previous measurements, the SF 6 spectrum appears shifted by ∼ 0.5 eV, about twice the uncertainty of the earlier results. Our result for Ne shows a large departure from earlier results, but may suffer from larger systematic effects than our other measurements. The molecular spectra agree well with our results of time-dependent density functional theory. We find that the statistical uncertainty allows calibrations in the desired range of 1–10 meV, however, systematic contributions still limit the uncertainty to ∼ 40–100 meV, mainly due to the temporal stability of the monochromator energy scale. Combining our absolute calibration technique with a relative energy calibration technique such as photoelectron energy spectroscopy will be necessary to realize its full potential of achieving uncertainties as low as 1–10 meV. Graphical abstract: [Figure not available: see fulltext.].

Authors with CRIS profile

Jakob Stierhof Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Matthias Bissinger Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Maria Hirsch Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Ralf Ballhausen Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Melanie Lang Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Christina Gräfe Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Philipp Hansmann Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien Jörn Wilms Lehrstuhl für Astronomie und Astrophysik

Involved external institutions

Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics DE Germany (DE) Deutsches Elektronen-Synchrotron DESY DE Germany (DE) Ulsan National Institute of Science and Technology (UNIST) / 울산과학기술원 KR Korea, Republic of (KR) National Aeronautics and Space Administration (NASA) US United States (USA) (US) Lawrence Livermore National Laboratory US United States (USA) (US) Friedrich-Schiller-Universität Jena DE Germany (DE) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Institut de Recherche en Astrophysique et Planétologie (IRAP) FR France (FR)

How to cite

APA:

Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C.,... Leutenegger, M.A. (2022). A new benchmark of soft X-ray transition energies of Ne , CO 2 , and SF 6 : paving a pathway towards ppm accuracy. European Physical Journal D, 76(3). https://doi.org/10.1140/epjd/s10053-022-00355-0

MLA:

Stierhof, Jakob, et al. "A new benchmark of soft X-ray transition energies of Ne , CO 2 , and SF 6 : paving a pathway towards ppm accuracy." European Physical Journal D 76.3 (2022).

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