Thorium nuclear clocks for fundamental tests of physics

Project Information

ThoriumNuclearClock

Grant agreement ID: 856415

DOI 10.3030/856415

EC signature date 28 January 2020

Start date 1 February 2020

End date 31 January 2026

Funded under

• EXCELLENT SCIENCE - European Research Council (ERC)

Total cost € 13 789 990,00

EU contribution € 13 789 990,00

Coordinated by

TECHNISCHE UNIVERSITAET WIEN
Austria

Deliverables

Open Research Data Pilot (1)

Data Management Plan (DMP)

Implements the Open Research Data Pilot

Publications

Peer reviewed articles (34)

The thorium-229 low-energy isomer and the nuclear clock

Author(s): Kjeld Beeks, Tomas Sikorsky, Thorsten Schumm, Johannes Thielking, Maxim V. Okhapkin, Ekkehard Peik
Published in: Nature Reviews Physics, Issue 3/4, 2021, Page(s) 238-248, ISSN 2522-5820
Publisher: Springer Nature
DOI: 10.1038/s42254-021-00286-6

Nuclear coherent population transfer to the $^{229m}$Th isomer using x-ray pulses

Author(s): Kirschbaum, Tobias; Minkov, Nikolay; Pálffy, Adriana
Published in: Physical Review C, Issue 5, 2022, Page(s) 064313, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/physrevc.105.064313

Group delay dispersion tuned femtosecond Kerr-lens mode-locked Ti:sapphire laser

Author(s): E. Seres; J. Seres; T. Schumm
Published in: Optics Continuum, Issue 1, 2022, ISSN 2770-0208
Publisher: Optica Publishing Group
DOI: 10.1364/optcon.456954

Band Gap Calculations for Thorium‐Doped LiCAF

Author(s): Thorsten Schumm; Peter Mohn; Martin Pimon
Published in: Advanced Theory and Simulations, Issue 5, 2022, ISSN 2513-0390
Publisher: Wiley-VCH GmbH
DOI: 10.1002/adts.202200185

Probing the relaxed relaxion at the luminosity and precision frontiers

Author(s): Abhishek Banerjee, Hyungjin Kim, Oleksii Matsedonskyi, Gilad Perez, Marianna S. Safronova
Published in: Journal of High Energy Physics, Issue 2020/7, 2020, ISSN 1029-8479
Publisher: Institute of Physics Publishing
DOI: 10.1007/jhep07(2020)153

Ab-Initio Study of Calcium Fluoride Doped with Heavy Isotopes

Author(s): Thorsten Schumm; Peter Mohn; Andreas Grüneis; Martin Pimon
Published in: Crystals, Issue 12, 2022, ISSN 2073-4352
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/cryst12081128

Contribution of negative-energy states to multipolar polarizabilities of the Sr optical lattice clock

Author(s): S. G. Porsev; M. G. Kozlov; M. S. Safronova
Published in: Phys. Rev. A, Issue 11, 2023, Page(s) L051102, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/physreva.108.l051102

Nonperturbative Generation of Harmonics by Nanometer-Scale Localized Electronic States on the Surface of Bulk Materials and Nano-Films

Author(s): Jozsef Seres; Enikoe Seres; Eva Céspedes; Leyre Martinez-de-Olcoz; Miguel Zabala; Thorsten Schumm
Published in: Optics; Volume 4; Issue 1; Pages: 246-257, Issue 7, 2023, Page(s) 4, ISSN 2328-7810
Publisher: Science Publishing Group
DOI: 10.3390/opt4010017

Nuclear Excitation of the ^{229}Th Isomer via Defect States in Doped Crystals.

Author(s): Brenden Scott Nickerson; Martin Pimon; Pavlo V. Bilous; Johannes Gugler; Kjeld Beeks; Tomas Sikorsky; Peter Mohn; Thorsten Schumm; Adriana Pálffy
Published in: Physical Review Letters, Issue 4, 2020, Page(s) 032501, ISSN 1079-7114
Publisher: American Physical Society
DOI: 10.1103/physrevlett.125.032501

New Measurement Resolves Key Astrophysical Fe XVII Oscillator Strength Problem

Author(s): Steffen Kühn; Charles Cheung; Natalia S. Oreshkina; René Steinbrügge; Moto Togawa; Sonja Bernitt; Lukas Berger; Jens Buck; Moritz Hoesch; Jörn Seltmann; Florian Trinter; Christoph H. Keitel; Mikhail G. Kozlov; Sergey G. Porsev; Ming Feng Gu; F. Scott Porter; Thomas Pfeifer; Maurice A. Leutenegger; Zoltán Harman; Marianna S. Safronova; José R. Crespo López-Urrutia; Chintan Shah
Published in: Physical review letters 129(24), 245001 (2022). doi:10.1103/PhysRevLett.129.245001, Issue 2, 2022, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.15120/gsi-2022-00990

Observation of the radiative decay of the 229Th nuclear clock isomer

Author(s): Sandro Kraemer; Janni Moens; Michail Athanasakis-Kaklamanakis; Silvia Bara; Kjeld Beeks; Premaditya Chhetri; Katerina Chrysalidis; Arno Claessens; Thomas E. Cocolios; João G. M. Correia; Hilde De Witte; Rafael Ferrer; Sarina Geldhof; Reinhard Heinke; Niyusha Hosseini; Mark Huyse; Ulli Köster; Yuri Kudryavtsev; Mustapha Laatiaoui; Razvan Lica; Goele Magchiels; Vladimir Manea; Clement Merckling; L
Published in: "Nature, 2023, 617 (7962), pp.706-710. ⟨10.1038/s41586-023-05894-z⟩", Issue 32, 2023, ISSN 1476-4687
Publisher: Springer
DOI: 10.1038/s41586-023-05894-z

High harmonic generation in AlN due to out-of-surface electron orbitals

Author(s): Jozsef Seres; E. Seres; Carles Serrat; Thorsten Schumm
Published in: OSA Continuum, Issue 4, 2020, ISSN 2578-7519
Publisher: Optica Publishing Group
DOI: 10.5281/zenodo.4441972

Low-lying energy levels of 229 Th 35+ and the electronic bridge process

Author(s): S G Porsev, C Cheung, M S Safronova
Published in: Quantum Science and Technology, Issue 6/3, 2021, Page(s) 034014, ISSN 2058-9565
Publisher: IOPScience
DOI: 10.1088/2058-9565/ac08f1

Calculation of energies and hyperfine structure constants of 233U^+ and 233U

Author(s): Porsev, S. G.; Cheung, C.; Safronova, M. S.
Published in: Physical Review A, Issue 12, 2023, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.106.042810

Growth and characterization of thorium doped calcium fluoride single crystals

Author(s): Kjeld Beeks
Published in: Nature Scientific reports, Issue 13, 2023, Page(s) 3897, ISSN 2045-2322
Publisher: Nature Publishing Group
DOI: 10.1038/s41598-023-31045-5

Nonlinear propagation effect in x-ray parametric amplification during high harmonic generation

Author(s): J. Seres; E. Seres; C. Serrat; T. H. Dinh; N. Hasegawa; M. Ishino; M. Nishikino; K. Nakano; S. Namba
Published in: Journal of the Optical Society of America B, Issue 39, 2022, ISSN 1084-7529
Publisher: Optical Society of America
DOI: 10.1364/josab.454902

The theory of direct laser excitation of nuclear transitions

Author(s): Lars von der Wense, Pavlo V. Bilous, Benedict Seiferle, Simon Stellmer, Johannes Weitenberg, Peter G. Thirolf, Adriana Pálffy, Georgy Kazakov
Published in: The European Physical Journal A, Issue 56/7, 2020, ISSN 1434-6001
Publisher: Springer Verlag
DOI: 10.1140/epja/s10050-020-00177-x

Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions

Author(s): J Thielking; K Zhang; J Tiedau; J Zander; G Zitzer; M V Okhapkin; E Peik
Published in: New Journal of Physics, Vol 25, Iss 8, p 083026 (2023), Issue 9, 2023, Page(s) 083026, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/aced1b

Driven electronic bridge processes via defect states in Th 229 -doped crystals

Author(s): Brenden S. Nickerson, Martin Pimon, Pavlo V. Bilous, Johannes Gugler, Georgy A. Kazakov, Tomas Sikorsky, Kjeld Beeks, Andreas Grüneis, Thorsten Schumm, Adriana Pálffy
Published in: Physical Review A, Issue 103/5, 2021, Page(s) 053120, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.103.053120

Excitation and probing of low-energy nuclear states at high-energy storage rings

Author(s): Junlan Jin; Hendrik Bekker; Tobias Kirschbaum; Yuri A. Litvinov; Adriana Pálffy; Jonas Sommerfeldt; Andrey Surzhykov; Peter G. Thirolf; Dmitry Budker
Published in: Physical review research 5(2), 023134 (2023). doi:10.1103/PhysRevResearch.5.023134, Issue 8, 2023, ISSN 2643-1564
Publisher: American Physical Society
DOI: 10.1103/physrevresearch.5.023134

SpaceQ -- Direct Detection of Ultralight Dark Matter with Space Quantum Sensors

Author(s): Yu-Dai Tsai; Joshua Eby; Marianna Safronova
Published in: Nature Astronomy, Issue 22, 2023, Page(s) 113, ISSN 2397-3366
Publisher: Springer Nature
DOI: 10.1038/s41550-022-01833-6

Optical telecommunications-band clock based on neutral titanium atoms

Author(s): Scott Eustice; Dmytro Filin; Jackson Schrott; Sergey Porsev; Charles Cheung; Diego Novoa; Dan M. Stamper-Kurn; Marianna S. Safronova
Published in: Phys. Rev. A, Issue 24, 2023, Page(s) L051102, ISSN 1050-2947
Publisher: American Physical Society
DOI: 10.1103/physreva.107.l051102

Absolute X-ray energy measurement using a high-accuracy angle encoder

Author(s): Takahiko Masuda, Tsukasa Watanabe, Kjeld Beeks, Hiroyuki Fujimoto, Takahiro Hiraki, Hiroyuki Kaino, Shinji Kitao, Yuki Miyamoto, Koichi Okai, Noboru Sasao, Makoto Seto, Thorsten Schumm, Yudai Shigekawa, Kenji Tamasaku, Satoshi Uetake, Atsushi Yamaguchi, Yoshitaka Yoda, Akihiro Yoshimi, Koji Yoshimura
Published in: Journal of Synchrotron Radiation, Issue 28/1, 2021, Page(s) 111-119, ISSN 1600-5775
Publisher: International Union of Crystallography
DOI: 10.1107/s1600577520014526

Precision Calculation of Hyperfine Constants for Extracting Nuclear Moments of Th229

Author(s): S. G. Porsev; M. S. Safronova; M. G. Kozlov
Published in: Physical Review Letters, Issue 127, 2021, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.127.253001

Role of triple excitations in calculating different properties of Ba +

Author(s): S. G. Porsev, M. S. Safronova
Published in: Physical Review A, Issue 103/4, 2021, Page(s) 042815, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.103.042815

Extending Our Knowledge about the 229Th Nuclear Isomer

Author(s): Seiferle, Benedict Moritz, Daniel Scharl, Kevin Ding, Shiqian Zacherl, Florian Löbell, Lilli
Published in: Atoms, 2022, ISSN 2218-2004
Publisher: MDPI
DOI: 10.3390/atoms10010024

Integrating Superregenerative Principles in a Compact, Power-Efficient NMR/NQR Spectrometer: A Novel Approach with Pulsed Excitation

Author(s): Sikorsky, Tomas; Pelczar, Andrzej; Schneider, Stephan; Schumm, Thorsten
Published in: Nuclear Instruments and Methods in Physics Research Section A, Issue 1062, 2023, Page(s) 169239, ISSN 1872-9576
Publisher: Elsevier
DOI: 10.1016/j.nima.2024.169239

'Phase Transition' in the 'Thorium-Isomer Story'

Author(s): P.G. Thirolf, B. Seiferle, L. v.d. Wense, I. Amersdorffer, D. Moritz, J. Weitenberg
Published in: Acta Physica Polonica B, Issue 51, 2020, Page(s) 561-570, ISSN 0587-4254
Publisher: Jagellonian University
DOI: 10.1103/physrevc.103.014313

Nuclear clocks for testing fundamental physics

Author(s): E Peik, T Schumm, M S Safronova, A Pálffy, J Weitenberg, P G Thirolf
Published in: Quantum Science and Technology, Issue 6/3, 2021, Page(s) 034002, ISSN 2058-9565
Publisher: IOP Publishing
DOI: 10.1088/2058-9565/abe9c2

"Enhancing divalent optical atomic clocks with the <mml:math xmlns:mml=""http://www.w3.org/1998/Math/MathML""><mml:mrow><mml:mmultiscripts><mml:mrow /><mml:mprescripts /><mml:none /><mml:mn>1</mml:mn></mml:mmultiscripts><mml:msub><mml:mi>S</mml:mi><mml:mn>0</mml:mn></mml:msub><mml:mo>↔</mml:mo><mml:msup><mml:mrow /><mml:mn>3</mml:mn></mml:msup><mml:msub><mml:mi>P</mml:mi><mml:mn>2</mml:mn></mml:ms"

Author(s): Matthew A. Bohman; Sergey G. Porsev; David B. Hume; David R. Leibrandt; Marianna S. Safronova
Published in: Phys. Rev. A, Issue 8, 2023, Page(s) 053120, ISSN 1050-2947
Publisher: American Physical Society
DOI: 10.1103/physreva.108.053120

Electronic Bridge Excitation in Highly Charged Th 229 Ions

Author(s): Pavlo V. Bilous; H. Bekker; H. Bekker; Julian C. Berengut; Julian C. Berengut; Benedict Seiferle; Lars von der Wense; Peter G. Thirolf; Thomas Pfeifer; José R. Crespo López-Urrutia; Adriana Pálffy
Published in: Physical Review Letters, Issue 2, 2020, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.124.192502

The phenomenology of quadratically coupled ultra light dark matter

Author(s): Abhishek Banerjee; Gilad Perez; Marianna Safronova; Inbar Savoray; Aviv Shalit
Published in: Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-62 (2023), Issue 21, 2023, ISSN 1029-8479
Publisher: Institute of Physics Publishing
DOI: 10.1007/jhep10(2023)042

229mTh isomer from a nuclear model perspective

Author(s): Nikolay Minkov and Adriana Pálffy
Published in: Physical Review C, 2021, ISSN 2469-9985
Publisher: American Physical Society
DOI: 10.1103/PhysRevC.103.014313

Measurement of the Th 229 Isomer Energy with a Magnetic Microcalorimeter

Author(s): Tomas Sikorsky, Jeschua Geist, Daniel Hengstler, Sebastian Kempf, Loredana Gastaldo, Christian Enss, Christoph Mokry, Jörg Runke, Christoph E. Düllmann, Peter Wobrauschek, Kjeld Beeks, Veronika Rosecker, Johannes H. Sterba, Georgy Kazakov, Thorsten Schumm, Andreas Fleischmann
Published in: Physical Review Letters, Issue 125/14, 2020, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.125.142503

Non-peer reviewed articles (1)

The Thorium-Isomer: Heartbeat for a Nuclear Clock

Author(s): Peter G. Thirolf, B. Seiferle, L. v. d. Wense
Published in: Nuclear Physics News, Issue 31/1, 2021, Page(s) 13-18, ISSN 1061-9127
Publisher: Taylor and Francis Inc.
DOI: 10.1080/10619127.2020.1832809