183 citations · 380 across the 13 of their papers we have counts for
15 papers
Origin of the inhomogeneous linewidth in a solid state Th:CaF nuclear clock
Kai Li, Tian Ooi, Jack F. Doyle +7
Narrow linewidth (high-Q) quantum discriminators are essential for realizing solid-state Th nuclear clocks, yet the observed transition linewidths remain at the tens-to-hun…
Defect Dynamics and Isomer Quenching in Th:CaF Crystals
Ming Guan, Michael Bartokos, Kjeld Beeks +16
Thorium-229 doped calcium fluoride (Th:CaF) is a leading candidate for a solid-state nuclear clock, owing to the unusually low energy of the Th isomer transitio…
Probing Ultralight Dark Matter at the Mega-Planck Scale with the Thorium Nuclear Clock
Jason Arakawa, Jack F. Doyle, Elina Fuchs +10
Ultralight dark matter is expected to induce oscillations of nuclear parameters. These oscillations are characterized by extremely weak couplings or high suppression scales, with t…
Laser Mössbauer spectroscopy of ^{229}Th
Takahiro Hiraki, Takahiko Masuda, Sayuri Takatori +23
Mössbauer spectroscopy is widely used in biochemistry, geology, and solid-state physics to obtain structural information on materials. Here, we extend this technique into the optic…
Frequency reproducibility of solid-state Th-229 nuclear clocks
Tian Ooi, Jack F. Doyle, Chuankun Zhang +5
Solid-state Th nuclear clocks are set to provide new opportunities for precision metrology and fundamental physics. Taking advantage of a nuclear transition's inherent low…
X-ray-induced quenching of the Th clock isomer in CaF
Ming Guan, Michael Bartokos, Kjeld Beeks +27
Thorium-229 has the lowest nuclear-excited state (an isomer state) at approximately 8.356 eV, making it excitable with tabletop vacuum-ultraviolet lasers. Despite the recent succes…
An Embedding Cluster Approach for Accurate Electronic Structure Calculations of (229)Th:CaF2
Kamil Nalikowski, Valera Veryazov, Kjeld Beeks +2
Building on recent advances of the embedded cluster approach combined with multiconfigurational theory, this work investigates the electronic states in thorium-doped CaF2 crystals.…
A method to detect the VUV photons from cooled Th:CaF crystals
Ming Guan, Michael Bartokos, Kjeld Beeks +13
Thorium-229, with its exceptionally low-energy nuclear excited state, is a key candidate for developing nuclear clocks. Th-doped CaF crystals, benefiting from calcium f…
Temperature sensitivity of a Thorium-229 solid-state nuclear clock
Jacob S. Higgins, Tian Ooi, Jack F. Doyle +5
Quantum state-resolved spectroscopy of the low energy thorium-229 nuclear transition was recently achieved. The five allowed transitions within the electric quadrupole structure we…
Fine-structure constant sensitivity of the Th-229 nuclear clock transition
Kjeld Beeks, Georgy A. Kazakov, Fabian Schaden +12
State-resolved laser spectroscopy at the 10 precision level recently reported in :2406.18719 determined the fractional change in nuclear quadrupole moment between th…
Frequency ratio of the Th nuclear isomeric transition and the Sr atomic clock
Chuankun Zhang, Tian Ooi, Jacob S. Higgins +9
Optical atomic clocks use electronic energy levels to precisely keep track of time. A clock based on nuclear energy levels promises a next-generation platform for precision…
Controlling Th isomeric state population in a VUV transparent crystal
Takahiro Hiraki, Koichi Okai, Michael Bartokos +27
The radioisotope Th-229 is renowned for its extraordinarily low-energy, long-lived nuclear first-excited state. This isomeric state can be excited by VUV lasers and the transition…
Integrating Superregenerative Principles in a Compact, Power-Efficient NMR/NQR Spectrometer: A Novel Approach with Pulsed Excitation
Tomas Sikorsky, Andrzej Pelczar, Stephan Schneider +1
We present a new approach to Nuclear Quadrupole Resonance (NQR)/Nuclear Magnetic Resonance (NMR) spectroscopy, the Damp-Enhanced Superregenerative Nuclear Spin Analyser (DESSA). Th…
Optical Transmission Enhancement of Ionic Crystals via Superionic Fluoride Transfer: Growing VUV-Transparent Radioactive Crystals
Kjeld Beeks, Tomas Sikorsky, Fabian Schaden +11
The 8 eV first nuclear excited state in Th is a candidate for implementing an nuclear clock. Doping Th into ionic crystals such as CaF is expected to suppress n…
Performance of a 229 Thorium solid-state nuclear clock
G. A. Kazakov, A. N. Litvinov, V. I. Romanenko +5
The 7.8 eV nuclear isomer transition in 229 Thorium has been suggested as an etalon transition in a new type of optical frequency standard. Here we discuss the construction of a "s…