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- W3014578749 abstract "We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable transitions of highly charged ions, allowing us to measure the K-shell Rydberg spectrum of molecular O2 with 8 meV uncertainty. We reveal a systematic ∼450 meV shift from previous literature values, and settle an extraordinary discrepancy between astrophysical and laboratory measurements of neutral atomic oxygen, the latter being calibrated against the aforementioned O2 literature values. Because of the widespread use of such, now deprecated, references, our method impacts on many branches of x-ray absorption spectroscopy. Moreover, it potentially reduces absolute uncertainties there to below the meV level.Received 30 March 2020Revised 19 October 2020Accepted 30 October 2020DOI:https://doi.org/10.1103/PhysRevLett.125.243001© 2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasAtomic & molecular structureAtomic spectraMolecular spectraPhysical SystemsInterstellar mediumAtomic, Molecular & Optical" @default.
- W3014578749 created "2020-04-10" @default.
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- W3014578749 date "2020-12-08" @default.
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- W3014578749 title "High-Precision Determination of Oxygen <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> Transition Energy Excludes Incongruent Motion of Interstellar Oxygen" @default.
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- W3014578749 doi "https://doi.org/10.1103/physrevlett.125.243001" @default.
- W3014578749 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33412031" @default.
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