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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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Main Authors: Kromer, Kathrin (Author) , Lyu, Chunhai (Author) , Door, Menno (Author) , Filianin, Pavel (Author) , Harman, Zoltán (Author) , Herkenhoff, Jost (Author) , Huang, Wenjia (Author) , Keitel, Christoph H. (Author) , Lange, Daniel (Author) , Novikov, Yuri N. (Author) , Schweiger, Christoph (Author) , Eliseev, Sergey (Author) , Blaum, Klaus (Author)
Format: Article (Journal)
Language:English
Published: 25 October 2022
In: The European physical journal. A, Hadrons and nuclei
Year: 2022, Volume: 58, Issue: 10, Pages: 1-8
ISSN:1434-601X
DOI:10.1140/epja/s10050-022-00860-1
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epja/s10050-022-00860-1
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Author Notes: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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Summary: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.
Item Description:Gesehen am 18.01.2023
Im Titel ist die Zahl 208 hochgestellt
Physical Description:Online Resource
ISSN:1434-601X
DOI:10.1140/epja/s10050-022-00860-1

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