Towards High Accuracy Nuclear Spectroscopy with Thorium

Presentations

• Controlling the Crystal Environment: Making a Thorium-229 doped Calcium Fluoride Nuclear Clock Seaworthy

  ORAL · Invited

  March 17, 2026, 8:00 AM – March 17, 2026, 8:36 AM

  Publication: Beeks, Kjeld, et al. "Optical transmission enhancement of ionic crystals via superionic fluoride transfer: growing VUV-transparent radioactive crystals." Physical Review B 109.9 (2024): 094111.
  Beeks, Kjeld, et al. "Fine-structure constant sensitivity of the Th-229 nuclear clock transition." Nature communications 16.1 (2025): 9147.
  Schaden, F., et al. "Laser-induced quenching of the Th-229 nuclear clock isomer in calcium fluoride." Physical Review Research 7.2 (2025): L022036.
  Guan, Ming, et al. "X-ray induced quenching of the 229Th clock isomer in CaF2." arXiv preprint arXiv:2505.03852 (2025).
  Ooi, Tian, et al. "Frequency reproducibility of solid-state Th-229 nuclear clocks." arXiv preprint arXiv:2507.01180 (2025).
  Hiraki, Takahiro, et al. "Laser Mössbauer spectroscopy of 229Th." arXiv preprint arXiv:2509.00041 (2025).

  Presenters

  • Kjeld Beeks

  Authors

  • Kjeld Beeks

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• Nuclear clocks: What now?

  ORAL · Invited

  March 17, 2026, 8:36 AM – March 17, 2026, 9:12 AM

  Publication: 1. J. Tiedau et al., Phys. Rev. Lett. 132, 182501 (2024)
  2. C. Zhang et al., Nature 633, 63 (2024)
  3. R. Elwell et al., Phys. Rev. Lett. 133, 013201 (2024)
  4. C. Zhang et al., Nature 636, 603 (2024)
  5. R. Elwell et al., Nature (in press) (arXiv:2506.03018)
  6. H. Morgan et al., Phys. Rev. Lett. 134, 253801 (2025)
  7. U. Perera et al., Phys. Rev. Lett. 135, 123001 (2025)
  8. J. Terhune et al., Phys. Rev. Res. 7, L022062 (2025)

  Presenters

  • Eric R. Hudson

    • University of California, Los Angeles

  Authors

  • Eric R. Hudson

    • University of California, Los Angeles

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• CW laser sources for exciting the thorium clock transition

  ORAL · Invited

  March 17, 2026, 9:12 AM – March 17, 2026, 9:48 AM

  Publication: https://arxiv.org/pdf/2507.17719

  Presenters

  • Johannes Tiedau

    • Physik-Tech Bundesanstalt

  Authors

  • Johannes Tiedau

    • Physik-Tech Bundesanstalt

  • Vishal Lal

    • Physik-Tech Bundesanstalt

  • Maksim V Okhapkin

    • Physik-Tech Bundesanstalt

  • Niels Irwin

    • Physik-Tech Bundesanstalt

  • Valentin Petrov

    • Max-Born-Insitut

  • Ekkehard Peik

    • Physik-Tech Bundesanstalt

  View abstract →