Atomic mass determination of uranium-238

Kromer, Kathrin; Lyu, Chunhai; Bieron, Jacek; Door, Menno; Enzmann, Lucia; Filianin, Pavel; Gaigalas, Gediminas; Harman, Zoltán; Herkenhoff, Jost; Huang, Wenjia; Keitel, Christoph H.; Eliseev, Sergey; Blaum, Klaus

doi:10.1103/PhysRevC.109.L021301

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Atomic mass determination of uranium-238

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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Enzmann, Lucia
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, Zoltán
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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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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https://journals.aps.org/prc/pdf/10.1103/PhysRevC.109.L021301
(Publisher version)

https://arxiv.org/pdf/2312.17041
(Preprint)

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Citation

Kromer, K., Lyu, C., Bieron, J., Door, M., Enzmann, L., Filianin, P., et al. (2024). Atomic mass determination of uranium-238. Physical Review C, 109(2): L021301. doi:10.1103/PhysRevC.109.L021301.

Cite as: https://hdl.handle.net/21.11116/0000-000E-5D3D-7

Abstract

The atomic mass of uranium-238 has been determined to be 238.050787618(15) u, improving the literature uncertainty by two orders of magnitude. It is obtained from a measurement of the mass ratio of ²³⁸U⁴⁷⁺ and ¹³²Xe²⁶⁺ ions with an uncertainty of 3.5×10⁻¹². The measurement was carried out with the Penning-trap mass spectrometer Pentatrap and was accompanied by a calculation of the binding energies E_U and E_Xe of the 47 and 26 missing electrons of the two highly charged ions, respectively. These binding energies were determined using an ab initio multiconfiguration Dirac-Hartree-Fock method to be E_U=39927(10) eV and E_Xe=8971.2(21) eV. The new mass value will serve as a reference for high-precision mass measurements in the heavy mass region of the nuclear chart up to transuranium nuclides.