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1.
Smooth trends in fermium charge radii and the impact of shell effects / Warbinek, Jessica (Darmstadt, GSI ; Mainz U. ; CERN ; Helmholtz Inst., Mainz) ; Rickert, Elisabeth (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Raeder, Sebastian (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Albrecht-Schönzart, Thomas (Colorado School of Mines) ; Andelic, Brankica (Darmstadt, GSI ; Helmholtz Inst., Mainz ; Groningen U.) ; Auler, Julian (Mainz U.) ; Bally, Benjamin (IRFU, Saclay) ; Bender, Michael (IP2I, Lyon) ; Berndt, Sebastian (Mainz U.) ; Block, Michael (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) et al.
The quantum-mechanical nuclear-shell structure determines the stability and limits of the existence of the heaviest nuclides with large proton numbers Z ≳ 100 (refs. $^{1–3}$). [...]
2024 - 5 p. - Published in : Nature 634 (2024) 1075-1079 Fulltext: PDF;
2.
Radiative Decay of the $^{229m}$Th Nuclear Clock Isomer in Different Host Materials / Pineda, S.V. (Leuven U.) ; Chhetri, P. (Leuven U. ; Mainz U.) ; Bara, S. (Leuven U.) ; Elskens, Y. (Leuven U.) ; Casci, S. (Leuven U.) ; Alexandrova, A.N. (UCLA, Los Angeles (main)) ; Au, M. (CERN) ; Athanasakis-Kaklamanakis, M. (Leuven U. ; CERN ; Imperial Coll., London) ; Bartokos, M. (Vienna, Tech. U., Atominst.) ; Beeks, K. (Ecole Polytechnique, Lausanne) et al.
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay of the $^{229m}$Th nuclear clock isomer embedded in different host materials is reported. [...]
arXiv:2408.12309.
- 13.
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3.
A setup for vacuum-ultraviolet spectroscopy of the $^{229}$Th low-energy isomer / Kraemer, Sandro (KU Leuven ; LMU, Garching) ; Chhetri, Premaditya (KU Leuven) ; Bara, Silvia (KU Leuven) ; Claessens, Arno (KU Leuven) ; De Witte, Hilde (KU Leuven) ; Elskens, Yens (KU Leuven) ; Ferrer, Rafael (KU Leuven) ; Kudryavtsev, Yuri (KU Leuven) ; Sels, Simon (KU Leuven) ; Van Den Bergh, Paul (KU Leuven) et al.
The ground-state transition of the low-energy isomer in $^{229}$Th has been proposed as the basis for the development of a novel optical clock as a tool for fundamental-physics studies. Vacuum-ultraviolet studies of the 𝛽-decay of 229Ac recently enabled to measure the de-excitation energy of the isomer with a sevenfold improvement in precision compared to previous results by directly observing photons from the isomer’s radiative decay. [...]
2023 - 3 p. - Published in : Nucl. Instrum. Methods Phys. Res., B 542 (2023) 1-3
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022
4.
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;
5.
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.
- 2022.
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