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Magnesium-Vacancy Optical Centers in Diamond
/ Corte, Emilio ; Andrini, Greta ; Nieto Hernández, Elena ; Pugliese, Vanna ; Costa, Ângelo ; Magchiels, Goele ; Moens, Janni ; Tunhuma, Shandirai Malven ; Villarreal, Renan ; Pereira, Lino M. C. et al.
We provide the first systematic characterization of the structural and photoluminescence properties of optically active centers fabricated upon implantation of 30–100 keV Mg+ ions in synthetic diamond. The structural configurations of Mg-related defects were studied by the electron emission channeling technique for short-lived, radioactive 27Mg implantations at the CERN-ISOLDE facility, performed both at room temperature and 800 °C, which allowed the identification of a major fraction of Mg atoms (∼30 to 42%) in sites which are compatible with the split-vacancy structure of the MgV complex. [...]
- Published in : ACS Photonics 10 (2023) 101-110
Fulltext: MgV_SupportingInformation - PDF; ACSPhotonics_2023_10_0101 - PDF;
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Quantum colour centers in diamond studied by emission channeling with short-lived isotopes (EC-SLI) and radiotracer photoluminescence
/ Pereira, LMC (KU Leuven) ; Wahl, U (Instituto Superior Técnico) ; Correia, JG (Instituto Superior Técnico) ; Biesmans, B (KU Leuven) ; Costa, ARG (KU Leuven) ; da Silva, MR (Universidade de Aveiro) ; David Bosne, E (Technical University Prague) ; Lamelas, A (Universidade de Aveiro) ; Magchiels, G (KU Leuven) ; Moens, J (KU Leuven) et al.
CERN-INTC-2023-004 ; INTC-P-562-ADD-1.
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2023.
Fulltext - Original Document (INTC-P-562)
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Observation of the radiative decay of the ${}^{229}\mathrm{Th}$ nuclear clock isomer
/ Kraemer, Sandro (Leuven U. ; LMU Munich (main)) ; Moens, Janni (Leuven U.) ; Athanasakis-Kaklamanakis, Michail (Leuven U. ; CERN) ; Bara, Silvia (Leuven U.) ; Beeks, Kjeld (Vienna, Tech. U., Atominst.) ; Chhetri, Premaditya (Leuven U.) ; Chrysalidis, Katerina (CERN) ; Claessens, Arno (Leuven U.) ; Cocolios, Thomas E. (Leuven U.) ; Correia, João G.M. (Lisbon U.) et al.
The nucleus of the radioisotope thorium-229 (${}^{229}$Th) features an isomer with an exceptionally low excitation energy that enables direct laser manipulation of nuclear states. For this reason, it is a leading candidate for use in next-generation optical clocks. [...]
arXiv:2209.10276.-
2023-05-24 - 15 p.
- Published in : Nature 617 (2023) 706–710
Fulltext: PDF;
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Direct evidence of Be as an amphoteric dopant in GaN
/ Wahl, U. (IST, Lisbon) ; Correia, J. G. (IST, Lisbon) ; Costa, A. R. G. (KU Leuven) ; Lima, T. A. L. (KU Leuven) ; Moens, J. (KU Leuven) ; Kappers, M. J. (Cambridge U.) ; da Silva, M. R. (Aveiro U., CICECO) ; Pereira, L. M. C. (KU Leuven) ; Vantomme, A. (KU Leuven)
/IS634 Collaboration
The interest in Be as an impurity in GaN stems from the challenge to understand why GaN can be doped p type with Mg, while this does not work for Be. While theory has actually predicted an acceptor level for Be that is shallower than Mg, it was also argued that Be is not a suitable acceptor because its am-photeric nature, i.e. [...]
2022
- Published in : Phys. Rev. B 105 (2022) 184112
Postprint from Phys. Rev. B 105 (2022) 184112: PDF; Supplemental Material from Phys. Rev. B 105 (2022) 184114: PDF;
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Study of the radiative decay of the low-energy isomer in $^{229}$Th
/ Chhetri, Premaditya (KU Leuven) ; Bara, Silvia (KU Leuven) ; Beeks, Kjeld (TU Wein) ; Bernerd, Cyril (KU Leuven, CERN) ; Block, Michael (GSI Darmstadt, HIM Mainz, University of Mainz) ; Claessens, Arno (KU Leuven) ; Cocolios, Thomas Elias (KU Leuven) ; Martins Correia, João Guilherme (Universidade de Lisboa) ; Granadeiro Costa, Angelo Rafael (KU Leuven) ; Cottenier, Stefaan (Ghent University) et al.
CERN-INTC-2022-017 ; INTC-P-628.
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2022.
Fulltext
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Quantum colour centers in diamond studied by emission channeling with short-lived isotopes (EC-SLI) and radiotracer photoluminescence
/ Pereira, Lino (KU Leuven, Quantum Solid State Physics (QSP), Belgium) ; Wahl, Ulrich (Instituto Superior Técnico, Universidade de Lisboa, Portugal) ; Correia, João Guilherme (Instituto Superior Técnico, Universidade de Lisboa, Portugal) ; Costa, Ângelo (CERN-TE, Geneva, Switzerland) ; David Bosne, Eric (Instituto Superior Técnico, Universidade de Lisboa, Portugal) ; Lima, Tiago (KU Leuven, Quantum Solid State Physics (QSP), Belgium) ; Moens, Janni (KU Leuven, Quantum Solid State Physics (QSP), Belgium) ; da Silva, Manuel (CICECO- Instituto de Materiais de Aveiro, Universidade de Aveiro, Portugal) ; Tunhuma, Malven (KU Leuven, Quantum Solid State Physics (QSP), Belgium) ; Vantomme, André (KU Leuven, Quantum Solid State Physics (QSP), Belgium) et al.
CERN-INTC-2020-037 ; INTC-P-562.
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2020.
Fulltext
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Study of the radiative decay of the low-energy isomer in ${}^{229}$Th
/ Kraemer, Sandro (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) ; Beeks, Kjeld (Institute of Atomic and Subatomic Physics, Vienna University of Technology, Austria) ; Block, Michael (GSI Helmholtzzentrum für Schwerionenforschung, Germany) ; Cocolios, Thomas (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) ; Correia, Guilherme (ISOLDE-CERN, Switzerland) ; Cottenier, Stefaan (Center for Molecular Modelling, Ghent University, Belgium) ; De Witte, Hilde (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) ; Dockx, Kristof (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) ; Ferrer, Rafael (Institute for Nuclear and Radiation Physics, KU Leuven, Belgium) ; Geldhof, Sarina (Department of Physics, University of Jyväskylä, Finland) et al.
CERN-INTC-2020-020 ; INTC-P-548.
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2020.
Fulltext
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Alternative approach to populate and study the $^{229}$Th nuclear clock isomer
/ Verlinde, M. (Leuven U.) ; Kraemer, S. (Leuven U.) ; Moens, J. (Leuven U.) ; Chrysalidis, K. (CERN) ; Correia, J.G. (Lisbon, IST) ; Cottenier, S. (U. Gent (main) ; Unlisted, BE) ; De Witte, H. (Leuven U.) ; Fedorov, D.V. (Kurchatov Inst., Moscow) ; Fedosseev, V.N. (CERN) ; Ferrer, R. (Leuven U.) et al.
A new approach to observe the radiative decay of the $^{229}$Th nuclear isomer, and to determine its energy and radiative lifetime, is presented. Situated at a uniquely low excitation energy, this nuclear state might be a key ingredient for the development of a nuclear clock, a nuclear laser and the search for time variations of the fundamental constants. [...]
arXiv:1904.10245.-
2019-08-12 - 10 p.
- Published in : Phys. Rev. C 100 (2019) 024315
Fulltext: PDF;
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