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Kjeld Beeks

Observed names: Beeks, K., Beeks, Kjeld, Beeks, Kjeld Adrianus Antonius Gerardus, Beeks, Kjeld; orcid:0000-0002-8707-6723, K Beeks, K. Beeks
ORCID: 0000-0002-8707-6723
Observed ORCID: 0000-0002-8707-6723
OpenAlex ID: A5085792367
Frequency ratio of the 229mTh nuclear isomeric transition and the 87Sr atomic clock
2024 · Chuankun Zhang, Tian Ooi, et al. · Nature · 198
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Laser Excitation of the Th-229 Nucleus
2024 · J. Tiedau, M. V. Okhapkin, et al. · Physical Review Letters · 179
Observation of the radiative decay of the 229Th nuclear clock isomer
2023 · Sandro Kraemer, Janni Moens, et al. · Nature · 149
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Measurement of the Th 229 Isomer Energy with a Magnetic Microcalorimeter
2020 · Tomas Sikorsky, Jeschua Geist, et al. · Physical Review Letters · 131
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The thorium-229 low-energy isomer and the nuclear clock
2021 · Kjeld Beeks, Tomas Sikorsky, et al. · Nature Reviews Physics · 127
Nuclear Excitation of the Th229 Isomer via Defect States in Doped Crystals
2020 · Brenden S. Nickerson, Martin Pimon, et al. · Physical Review Letters · 55
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Controlling 229Th isomeric state population in a VUV transparent crystal
2024 · Takahiro Hiraki, Koichi Okai, et al. · Nature Communications · 45
Growth and characterization of thorium-doped calcium fluoride single crystals
2023 · Kjeld Beeks, Tomas Sikorsky, et al. · Scientific Reports · 44
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Temperature Sensitivity of a Thorium-229 Solid-State Nuclear Clock
2025 · Jacob S. Higgins, Tian Ooi, et al. · Physical Review Letters · 32
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Laser-induced quenching of the Th-229 nuclear clock isomer in calcium fluoride
2025 · F. Schaden, T. Riebner, et al. · Physical Review Research · 22
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Driven electronic bridge processes via defect states in Th229 -doped crystals
2021 · Brenden S. Nickerson, Martin Pimon, et al. · Physical Review A · 18
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Fine-structure constant sensitivity of the Th-229 nuclear clock transition
2025 · Kjeld Beeks, Georgy A. Kazakov, et al. · Nature Communications · 17
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Optical transmission enhancement of ionic crystals via superionic fluoride transfer: Growing VUV-transparent radioactive crystals
2024 · Kjeld Beeks, Tomas Sikorsky, et al. · Physical review. B./Physical review. B · 16
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Frequency reproducibility of solid-state thorium-229 nuclear clocks
2026 · Tian Ooi, Jack F. Doyle, et al. · Nature · 14
Radiative decay of the Th 229 m nuclear clock isomer in different host materials
2025 · S. V. Pineda, P. Chhetri, et al. · Physical Review Research · 13
Absolute X-ray energy measurement using a high-accuracy angle encoder
2020 · Takahiko Masuda, Tsukasa Watanabe, et al. · Journal of Synchrotron Radiation · 9
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Embedded cluster approach for accurate electronic structure calculations of Th 229 : CaF 2
2025 · Kamil Nalikowski, Valera Veryazov, et al. · Physical review. B./Physical review. B · 8
Characterization of the thorium-229 defect structure in CaF 2 crystals
2025 · S Takatori, M Pimon, et al. · New Journal of Physics · 7
A thorium-229 optical nuclear clock with feedback loop
2026 · L. Toscani De Col, T. Riebner, et al. · Nature · 6
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Laser Mössbauer spectroscopy of 229 Th in CaF 2
2026 · Takahiro Hiraki, Takahiko Masuda, et al. · Science · 5
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X-Ray-Induced Quenching of the Th 229 Clock Isomer in CaF 2
2025 · Ming Guan, Michael Bartokos, et al. · Physical Review Letters · 5
A method to detect the VUV photons from cooled 229Th:CaF 2 crystals
2025 · Ming Guan, Michael Bartokos, et al. · Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms · 4
Experimental apparatus for detection of radiative decay of $$^{229}$$Th isomer from Th-doped CaF$$_2$$
2024 · Takahiro Hiraki, Kjeld Beeks, et al. · Interactions · 4
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Revisiting the Excitation of the Low-Lying Ta 181 m Isomer in Optical Laser-Generated Plasma
2024 · Simone Gargiulo, Ivan Madan, et al. · Physical Review Letters · 3
Continuous-wave laser absorption spectroscopy of the thorium-229 nucleus
2026 · I. Morawetz, T. Riebner, et al. · Nature · 2
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Works count: 49
Citation count: 1,125
H-index: 14
I10-index: 15
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