High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

Steffen Kühn; Chintan Shah; José R.Crespo López-Urrutia; Keisuke Fujii; René Steinbrügge; Jakob Stierhof; Moto Togawa; Zoltán Harman; Natalia S. Oreshkina; Charles Cheung; Mikhail G. Kozlov; Sergey G. Porsev; Marianna S. Safronova; Julian C. Berengut; Michael Rosner; Matthias Bissinger; Ralf Ballhausen; Natalie Hell; Sungnam Park; Moses Chung; Moritz Hoesch; Jörn Seltmann; Andrey S. Surzhykov; Vladimir A. Yerokhin; Jörn Wilms; F. Scott Porter; Thomas Stöhlker; Christoph H. Keitel; Thomas Pfeifer; Gregory V. Brown; Maurice A. Leutenegger; Sven Bernitt

doi:10.1103/PhysRevLett.124.225001

High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

Steffen Kühn, Chintan Shah, José R.Crespo López-Urrutia, Keisuke Fujii, René Steinbrügge, Jakob Stierhof, Moto Togawa, Zoltán Harman, Natalia S. Oreshkina, Charles Cheung, Mikhail G. Kozlov, Sergey G. Porsev, Marianna S. Safronova, Julian C. Berengut, Michael Rosner, Matthias Bissinger, Ralf Ballhausen, Natalie Hell, Sungnam Park, Moses ChungMoritz Hoesch, Jörn Seltmann, Andrey S. Surzhykov, Vladimir A. Yerokhin, Jörn Wilms, F. Scott Porter, Thomas Stöhlker, Christoph H. Keitel, Thomas Pfeifer, Gregory V. Brown, Maurice A. Leutenegger, Sven Bernitt

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

For more than 40 years, most astrophysical observations and laboratory studies of two key soft x-ray diagnostic 2p-3d transitions, 3C and 3D, in Fe XVII ions found oscillator strength ratios f(3C)/f(3D) disagreeing with theory, but uncertainties had precluded definitive statements on this much studied conundrum. Here, we resonantly excite these lines using synchrotron radiation at PETRA III, and reach, at a millionfold lower photon intensities, a 10 times higher spectral resolution, and 3 times smaller uncertainty than earlier work. Our final result of f(3C)/f(3D)=3.09(8)(6) supports many of the earlier clean astrophysical and laboratory observations, while departing by five sigmas from our own newest large-scale ab initio calculations, and excluding all proposed explanations, including those invoking nonlinear effects and population transfers.

Original language	English
Article number	225001
Journal	Physical Review Letters
Volume	124
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.124.225001
State	Published - Jun 5 2020
Externally published	Yes

Funding

Financial support was provided by the Max-Planck-Gesellschaft and Bundesministerium für Bildung und Forschung through Project No. 05K13SJ2. Work by C. S. was supported by the Deutsche Forschungsgemeinschaft Project No. 266229290 and by an appointment to the NASA Postdoctoral Program at the NASA Goddard Space Flight Center, administered by Universities Space Research Association under contract with NASA. Work by LLNL was performed under the auspices of the U.S. Department of Energy under Contract No. DE-AC52-07NA27344 and supported by NASA grants. M. A. L. and F. S. P. acknowledge support from NASA’s Astrophysics Program. The work of M. G. K. and S. G. P. was supported by the Russian Science Foundation under Grant No. 19-12-00157. The theoretical research was supported in part through the use of Information Technologies resources at the University of Delaware, specifically the high-performance Caviness computing cluster. The work of C. C. and M. S. S. was supported by USA NSF Grant No. PHY-1620687. Work by U. N. I. S. T. was supported by the National Research Foundation of Korea (Grant No. NRF-2016R1A5A1013277). J. C. B. acknowledges support from the Alexander von Humboldt Foundation. We acknowledge 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.

Funders	Funder number
NRF-2016R1A5A1013277
Universities Space Research Association
National Science Foundation	PHY-1620687
National Science Foundation
U.S. Department of Energy	DE-AC52-07NA27344
U.S. Department of Energy
Directorate for Mathematical and Physical Sciences	0301220
Directorate for Mathematical and Physical Sciences
National Aeronautics and Space Administration
Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft	266229290
Deutsche Forschungsgemeinschaft
Bundesministerium für Bildung und Forschung	05K13SJ2
Bundesministerium für Bildung und Forschung
National Research Foundation of Korea
Max-Planck-Gesellschaft
Russian Science Foundation	19-12-00157
Russian Science Foundation

Access to Document

10.1103/PhysRevLett.124.225001

Cite this

Kühn, S., Shah, C., López-Urrutia, J. R. C., Fujii, K., Steinbrügge, R., Stierhof, J., Togawa, M., Harman, Z., Oreshkina, N. S., Cheung, C., Kozlov, M. G., Porsev, S. G., Safronova, M. S., Berengut, J. C., Rosner, M., Bissinger, M., Ballhausen, R., Hell, N., Park, S., ... Bernitt, S. (2020). High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem. Physical Review Letters, 124(22), Article 225001. https://doi.org/10.1103/PhysRevLett.124.225001

@article{424b48a53fcd49a08192d47200fc64d0,

title = "High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem",

abstract = "For more than 40 years, most astrophysical observations and laboratory studies of two key soft x-ray diagnostic 2p-3d transitions, 3C and 3D, in Fe XVII ions found oscillator strength ratios f(3C)/f(3D) disagreeing with theory, but uncertainties had precluded definitive statements on this much studied conundrum. Here, we resonantly excite these lines using synchrotron radiation at PETRA III, and reach, at a millionfold lower photon intensities, a 10 times higher spectral resolution, and 3 times smaller uncertainty than earlier work. Our final result of f(3C)/f(3D)=3.09(8)(6) supports many of the earlier clean astrophysical and laboratory observations, while departing by five sigmas from our own newest large-scale ab initio calculations, and excluding all proposed explanations, including those invoking nonlinear effects and population transfers.",

author = "Steffen K{\"u}hn and Chintan Shah and L{\'o}pez-Urrutia, {Jos{\'e} R.Crespo} and Keisuke Fujii and Ren{\'e} Steinbr{\"u}gge and Jakob Stierhof and Moto Togawa and Zolt{\'a}n Harman and Oreshkina, {Natalia S.} and Charles Cheung and Kozlov, {Mikhail G.} and Porsev, {Sergey G.} and Safronova, {Marianna S.} and Berengut, {Julian C.} and Michael Rosner and Matthias Bissinger and Ralf Ballhausen and Natalie Hell and Sungnam Park and Moses Chung and Moritz Hoesch and J{\"o}rn Seltmann and Surzhykov, {Andrey S.} and Yerokhin, {Vladimir A.} and J{\"o}rn Wilms and Porter, {F. Scott} and Thomas St{\"o}hlker and Keitel, {Christoph H.} and Thomas Pfeifer and Brown, {Gregory V.} and Leutenegger, {Maurice A.} and Sven Bernitt",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.",

year = "2020",

month = jun,

day = "5",

doi = "10.1103/PhysRevLett.124.225001",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "22",

}

Kühn, S, Shah, C, López-Urrutia, JRC, Fujii, K, Steinbrügge, R, Stierhof, J, Togawa, M, Harman, Z, Oreshkina, NS, Cheung, C, Kozlov, MG, Porsev, SG, Safronova, MS, Berengut, JC, Rosner, M, Bissinger, M, Ballhausen, R, Hell, N, Park, S, Chung, M, Hoesch, M, Seltmann, J, Surzhykov, AS, Yerokhin, VA, Wilms, J, Porter, FS, Stöhlker, T, Keitel, CH, Pfeifer, T, Brown, GV, Leutenegger, MA & Bernitt, S 2020, 'High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem', Physical Review Letters, vol. 124, no. 22, 225001. https://doi.org/10.1103/PhysRevLett.124.225001

TY - JOUR

T1 - High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

AU - Kühn, Steffen

AU - Shah, Chintan

AU - López-Urrutia, José R.Crespo

AU - Fujii, Keisuke

AU - Steinbrügge, René

AU - Stierhof, Jakob

AU - Togawa, Moto

AU - Harman, Zoltán

AU - Oreshkina, Natalia S.

AU - Cheung, Charles

AU - Kozlov, Mikhail G.

AU - Porsev, Sergey G.

AU - Safronova, Marianna S.

AU - Berengut, Julian C.

AU - Rosner, Michael

AU - Bissinger, Matthias

AU - Ballhausen, Ralf

AU - Hell, Natalie

AU - Park, Sungnam

AU - Chung, Moses

AU - Hoesch, Moritz

AU - Seltmann, Jörn

AU - Surzhykov, Andrey S.

AU - Yerokhin, Vladimir A.

AU - Wilms, Jörn

AU - Porter, F. Scott

AU - Stöhlker, Thomas

AU - Keitel, Christoph H.

AU - Pfeifer, Thomas

AU - Brown, Gregory V.

AU - Leutenegger, Maurice A.

AU - Bernitt, Sven

N1 - Publisher Copyright: © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.

PY - 2020/6/5

Y1 - 2020/6/5

N2 - For more than 40 years, most astrophysical observations and laboratory studies of two key soft x-ray diagnostic 2p-3d transitions, 3C and 3D, in Fe XVII ions found oscillator strength ratios f(3C)/f(3D) disagreeing with theory, but uncertainties had precluded definitive statements on this much studied conundrum. Here, we resonantly excite these lines using synchrotron radiation at PETRA III, and reach, at a millionfold lower photon intensities, a 10 times higher spectral resolution, and 3 times smaller uncertainty than earlier work. Our final result of f(3C)/f(3D)=3.09(8)(6) supports many of the earlier clean astrophysical and laboratory observations, while departing by five sigmas from our own newest large-scale ab initio calculations, and excluding all proposed explanations, including those invoking nonlinear effects and population transfers.

AB - For more than 40 years, most astrophysical observations and laboratory studies of two key soft x-ray diagnostic 2p-3d transitions, 3C and 3D, in Fe XVII ions found oscillator strength ratios f(3C)/f(3D) disagreeing with theory, but uncertainties had precluded definitive statements on this much studied conundrum. Here, we resonantly excite these lines using synchrotron radiation at PETRA III, and reach, at a millionfold lower photon intensities, a 10 times higher spectral resolution, and 3 times smaller uncertainty than earlier work. Our final result of f(3C)/f(3D)=3.09(8)(6) supports many of the earlier clean astrophysical and laboratory observations, while departing by five sigmas from our own newest large-scale ab initio calculations, and excluding all proposed explanations, including those invoking nonlinear effects and population transfers.

UR - http://www.scopus.com/inward/record.url?scp=85086857325&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.124.225001

DO - 10.1103/PhysRevLett.124.225001

M3 - Article

C2 - 32567918

AN - SCOPUS:85086857325

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 225001

ER -

High Resolution Photoexcitation Measurements Exacerbate the Long-Standing Fe XVII Oscillator Strength Problem

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this