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A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy
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 $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$ gases, by measuring their photo ion-yield spectra at...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Lenguaje: | eng |
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2022
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1140/epjd/s10053-022-00355-0 https://dx.doi.org/10.1140/epjd/s10053-022-00379-6 http://cds.cern.ch/record/2803751 |
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author | 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, G.L. Park, S. Niskanen, J. Chung, M. Porter, F.S. Stöhlker, T. Pfeifer, T. Brown, G.V. Bernitt, S. Hansmann, P. Wilms, J. Crepso López-Urrutia, J.R. Leutenegger, M.A. |
author_facet | 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, G.L. Park, S. Niskanen, J. Chung, M. Porter, F.S. Stöhlker, T. Pfeifer, T. Brown, G.V. Bernitt, S. Hansmann, P. Wilms, J. Crepso López-Urrutia, J.R. Leutenegger, M.A. |
author_sort | Stierhof, J. |
collection | CERN |
description | 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 $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$ 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 $\mathrm {CO}_2$ result agrees well with previous measurements, the $\mathrm {SF}_6$ spectrum appears shifted by $\sim $0.5 eV, about twice the uncertainty of the earlier results. Our result for $\mathrm {Ne}$ 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 ${\sim }$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.[graphic not available: see fulltext][graphic not available: see fulltext] |
id | cern-2803751 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2022 |
record_format | invenio |
spelling | cern-28037512023-03-08T12:38:16Zdoi:10.1140/epjd/s10053-022-00355-0doi:10.1140/epjd/s10053-022-00379-6http://cds.cern.ch/record/2803751engStierhof, 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, G.L.Park, S.Niskanen, J.Chung, M.Porter, F.S.Stöhlker, T.Pfeifer, T.Brown, G.V.Bernitt, S.Hansmann, P.Wilms, J.Crepso López-Urrutia, J.R.Leutenegger, M.A.A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracyDetectors and Experimental TechniquesPhysics in GeneralOther Fields of PhysicsAstrophysics and AstronomyA 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 $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$ 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 $\mathrm {CO}_2$ result agrees well with previous measurements, the $\mathrm {SF}_6$ spectrum appears shifted by $\sim $0.5 eV, about twice the uncertainty of the earlier results. Our result for $\mathrm {Ne}$ 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 ${\sim }$40–100 meV, mainly due to the temporal stability of the monochromator energy scale. Combining our absolute calibration technique with a relative energy calibration technique such as photoelectron energy spectroscopy will be necessary to realize its full potential of achieving uncertainties as low as 1–10 meV.[graphic not available: see fulltext][graphic not available: see fulltext]A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We investigate the K-shell features of Ne, CO$_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.arXiv:2203.03725oai:cds.cern.ch:28037512022-03-07 |
spellingShingle | Detectors and Experimental Techniques Physics in General Other Fields of Physics Astrophysics and Astronomy 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, G.L. Park, S. Niskanen, J. Chung, M. Porter, F.S. Stöhlker, T. Pfeifer, T. Brown, G.V. Bernitt, S. Hansmann, P. Wilms, J. Crepso López-Urrutia, J.R. Leutenegger, M.A. A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title | A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title_full | A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title_fullStr | A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title_full_unstemmed | A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title_short | A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy |
title_sort | new benchmark of soft x-ray transition energies of $\mathrm {ne}$, $\mathrm {co}_2$, and $\mathrm {sf}_6$: paving a pathway towards ppm accuracy |
topic | Detectors and Experimental Techniques Physics in General Other Fields of Physics Astrophysics and Astronomy |
url | https://dx.doi.org/10.1140/epjd/s10053-022-00355-0 https://dx.doi.org/10.1140/epjd/s10053-022-00379-6 http://cds.cern.ch/record/2803751 |
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