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Showing 1–7 of 7 results
Advanced filters: Author: Kjeld Beeks Clear advanced filters

  • The authors report on new developments on the sensitivity of the nuclear clock transition in Th229 for new physics searches involving variations of the fine-structure constant. This highlights the need for developing of advanced nuclear models and parameter searches relating to experimental measurements.

    • Kjeld Beeks
    • Georgy A. Kazakov
    • Marianna S. Safronova
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-6

  • The nuclear clock transition of 229mTh in 229Th:CaF2 crystals is characterized as a function of doping concentration, temperature and time, demonstrating high reproducibility and identifying ideal operating characteristics of these crystals as nuclear clocks.

    • Tian Ooi
    • Jack F. Doyle
    • Thorsten Schumm
    Research
    Nature
    Volume: 650, P: 72-78

  • Thorium-229 has the extraordinarily low-energy nuclear state and therefore has potential in atomic clocks. Here, the authors measured the radiative branching fraction of the “clock state”, which is consistent with unity in crystals, and found that this state can be de-populated by X-ray beam irradiation.

    • Takahiro Hiraki
    • Koichi Okai
    • Koji Yoshimura
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • The authors report on the radiative decay of a low-energy isomer in thorium-229 (229mTh), which has consequences for the design of a future nuclear clock and eases the search for direct laser excitation of the atomic nucleus.

    • Sandro Kraemer
    • Janni Moens
    • Ulrich Wahl
    Research
    Nature
    Volume: 617, P: 706-710

  • A clock using the excitation of a low-energy excited state in the 229Th nucleus promises high accuracy and sensitivity to new physics. The recently measured properties of this nucleus will lead to nuclear laser spectroscopy with trapped Th ions and Th-doped crystals.

    • Kjeld Beeks
    • Tomas Sikorsky
    • Ekkehard Peik
    Reviews
    Nature Reviews Physics
    Volume: 3, P: 238-248