High-precision mass measurement of doubly magic 208Pb

Kromer, Kathrin; Lyu, Chunhai; Door, Menno; Filianin, Pavel; Harman, Zoltan; Herkenhoff, Jost; Huang, Wenjia; Keitel, Christoph H.; Lange, Daniel; Novikov, Yuri N.; Schweiger, Christoph; Eliseev, Sergey; Blaum, Klaus

doi:10.1140/epja/s10050-022-00860-1

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High-precision mass measurement of doubly magic ²⁰⁸Pb

MPS-Authors

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Kromer, Kathrin
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Lyu, Chunhai
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Door, Menno
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Filianin, Pavel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Harman, Zoltan
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Herkenhoff, Jost
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Keitel, Christoph H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Lange, Daniel
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Schweiger, Christoph
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Eliseev, Sergey
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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2210.11602.pdf
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Supplementary Material (public)

s10050-024-01276-9.pdf
(Supplementary material), 214KB

Citation

Kromer, K., Lyu, C., Door, M., Filianin, P., Harman, Z., Herkenhoff, J., et al. (2022). High-precision mass measurement of doubly magic ²⁰⁸Pb. The European Physical Journal A: Hadrons and Nuclei, 58: 202. doi:10.1140/epja/s10050-022-00860-1.

Cite as: https://hdl.handle.net/21.11116/0000-000B-578A-8

Abstract

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 E_Pb and E_Xe 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 . E_Pb and E_Xe have been computed with an uncertainty of 9.1 eV and 2.1 eV, respectively, yielding 207.976 650 571(14) u (u = 9.314 941 024 2(28) × 10⁸ eV/c² ) for the 208 Pb 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.