Observation of a Low-Lying Metastable Electronic State in Highly Charged Lead 
by Penning-Trap Mass Spectrometry

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

doi:10.1103/PhysRevLett.131.223002

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Observation of a Low-Lying Metastable Electronic State in Highly Charged Lead by Penning-Trap Mass Spectrometry

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

/persons/resource/persons194676

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

/persons/resource/persons30445

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;

External Resource

https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.131.223002
(出版社版)

https://www.mpi-hd.mpg.de/mpi/en/public-relations/news/news-item/default-7f99cca0ce
(付録資料)

https://www.mpi-hd.mpg.de/mpi/de/nachrichten/nachricht/default-7f99cca0ce
(付録資料)

https://arxiv.org/pdf/2310.19365
(プレプリント)

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引用

Kromer, K., Lyu, C., Door, M., Filianin, P., Harman, Z., Herkenhoff, J., Indelicato, P., Keitel, C. H., Lange, D., Novikov, Y. N., Schweiger, C., Eliseev, S., & Blaum, K. (2023). Observation of a Low-Lying Metastable Electronic State in Highly Charged Lead by Penning-Trap Mass Spectrometry. Physical Review Letters, 131(22):. doi:10.1103/PhysRevLett.131.223002.

引用: https://hdl.handle.net/21.11116/0000-000E-1BFB-A

要旨

Highly charged ions (HCIs) offer many opportunities for next-generation clock research due to the vast landscape of available electronic transitions in different charge states. The development of extreme ultraviolet frequency combs has enabled the search for clock transitions based on shorter wavelengths in HCIs. However, without initial knowledge of the energy of the clock states, these narrow transitions are difficult to be probed by lasers. In this Letter, we provide experimental observation and theoretical calculation of a long-lived electronic state in Nb-like Pb⁴¹⁺ that could be used as a clock state. With the mass spectrometer PENTATRAP, the excitation energy of this metastable state is directly determined as a mass difference at an energy of 31.2(8) eV, corresponding to one of the most precise relative mass determinations to date with a fractional uncertainty of 4×10⁻¹². This experimental result agrees within 1σ with two partially different ab initio multiconfiguration Dirac-Hartree-Fock calculations of 31.68(13) eV and 31.76(35) eV, respectively. With a calculated lifetime of 26.5(5.3) days, the transition from this metastable state to the ground state bears a quality factor of 1.1×10²³ and allows for the construction of a HCI clock with a fractional frequency instability of < 10⁻¹⁹/√τ.