Lifetime of the metastable P1/22 state of F-like Ar9+ isolated in a compact Penning trap
Abstract
Multiply ionized atoms of a single charge state can be captured at low energy in a compact Penning trap, allowing the measurement of the radiative lifetime of an atomic state that decays via weakly allowed transitions. Such a measurement is reported here for the radiative decay lifetime of the metastable $^{2}P_{1/2}$ state in fluorinelike ${\mathrm{Ar}}^{9+}$, wherein the $n=2$ shell has only one vacancy (hole) in a $2p$ orbital. Highly ionized atoms are extracted from an electron beam ion trap and guided into the ion capture apparatus. Upon capturing the ${\mathrm{Ar}}^{9+}$ ions, light from the magnetic-dipole transition is detected with a photomultiplier tube and counted with a multichannel scaler. Using this technique, the radiative lifetime of the metastable $^{2}P_{1/2}$ state in ${\mathrm{Ar}}^{9+}\phantom{\rule{4pt}{0ex}}1{s}^{2}\phantom{\rule{0.16em}{0ex}}2{s}^{2}\phantom{\rule{0.16em}{0ex}}2{p}^{5}$ is measured to be $\ensuremath{\tau}=9.31\ifmmode\pm\else\textpm\fi{}0.08$ ms, consistent with a previous intra-EBIT measurement.
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Many atomic ions with a nuclear quadrupole moment (I ≥ 1) possess ground-state clock transitions at non-zero magnetic field that are first-order insensitive to field fluctuations.
“Many atomic ions with a nuclear quadrupole moment (i.e. nuclear spin I ≥ 1) possess ground-state 'clock' transitions at non-zero magnetic field that are first-order insensitive to field fluctuations.”
From Second-Scale \n 9 \n Be \n + \n Spin Coherence in a Compact Penning Trap (2022) · cites this paper as [23]
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McMahon, B., & Sawyer, B. (2022) · Physical Review Applied · doi:10.1103/physrevapplied.17.014005 · Cited by 12 · see citing works
- Authors
- Brewer, S. M., Dreiling, J. M., Guise, N. D., Hoogerheide, S. F., Naing, A. S., & Tan, J. N.
- Affiliations
- National Institute of Standards and Technology (US)
- University of Delaware (US)
- Corresponding author
- Brewer, Samuel M.
- ORCID
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2018-09-06
- Volume
- 98
- Issue
- 3
- ISSN
- 0556-2791 (ISSN-L)
- 2469-9926
- 2469-9934
- OpenAlex
- W2891149982
- Cited by
- 8
- References
- 21
- Citations by year
- 2026: 2 · 2025: 1 · 2023: 2 · 2022: 1 · 2020: 1 · 2019: 1
- FWCI
- 0.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Physical Review A (publishedVersion)
- Funders
- National Institute of Standards and Technology
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Molecular Physics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Advanced Frequency and Time Standards
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Particle accelerators and beam dynamics
- Keywords
- radiative lifetime, multiply charged ions, Penning trap, electron beam ion trap, magnetic dipole transitions, highly charged ions
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