High-precision mass measurement of doubly magic 208Pb

The absolute atomic mass of 208Pb has been determined with a fractional uncertainty of 7×10−11 by measuring the cyclotron-frequency ratio R of 208Pb41+ to 132Xe26+ with the high-precision Penning-trap mass spectrometer Pentatrap and computing the binding energies EPb and EXe of the missing 41 and 26...

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Hauptverfasser: Kromer, Kathrin (VerfasserIn) , Lyu, Chunhai (VerfasserIn) , Door, Menno (VerfasserIn) , Filianin, Pavel (VerfasserIn) , Harman, Zoltán (VerfasserIn) , Herkenhoff, Jost (VerfasserIn) , Huang, Wenjia (VerfasserIn) , Keitel, Christoph H. (VerfasserIn) , Lange, Daniel (VerfasserIn) , Novikov, Yuri N. (VerfasserIn) , Schweiger, Christoph (VerfasserIn) , Eliseev, Sergey (VerfasserIn) , Blaum, Klaus (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 25 October 2022
In: The European physical journal. A, Hadrons and nuclei
Year: 2022, Jahrgang: 58, Heft: 10, Pages: 1-8
ISSN:1434-601X
DOI:10.1140/epja/s10050-022-00860-1
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epja/s10050-022-00860-1
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Verfasserangaben:Kathrin Kromer, Chunhai Lyu, Menno Door, Pavel Filianin, Zoltán Harman, Jost Herkenhoff, Wenjia Huang, Christoph H. Keitel, Daniel Lange, Yuri N. Novikov, Christoph Schweiger, Sergey Eliseev, Klaus Blaum

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520 |a The absolute atomic mass of 208Pb has been determined with a fractional uncertainty of 7×10−11 by measuring the cyclotron-frequency ratio R of 208Pb41+ to 132Xe26+ with the high-precision Penning-trap mass spectrometer Pentatrap and computing the binding energies EPb and EXe of the missing 41 and 26 atomic electrons, respectively, with the ab initio fully relativistic multi-configuration Dirac–Hartree–Fock (MCDHF) method. R has been measured with a relative precision of 9×10−12. EPb and EXe have been computed with an uncertainty of 9.1 eV and 2.1 eV, respectively, yielding 207.976650571(14) u (u=9.3149410242(28)×108 eV/c2) for the 208Pb neutral atomic mass. This result agrees within 1.2σ with that from the Atomic-Mass Evaluation (AME) 2020, while improving the precision by almost two orders of magnitude. The new mass value directly improves the mass precision of 14 nuclides in the region of Z = 81–84 and is the most precise mass value with A>200. Thus, the measurement establishes a new region of reference mass values which can be used e.g. for precision mass determination of transuranium nuclides, including the superheavies. 
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