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Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of $N = 32$
/ Koszorús, Á. (Leuven U.) ; Yang, X.F. (Peking U., SKLNPT) ; Jiang, W.G. (U. Tennessee, Knoxville ; Oak Ridge ; Chalmers U. Tech.) ; Novario, S.J. (U. Tennessee, Knoxville ; Oak Ridge) ; Bai, S.W. (Peking U., SKLNPT) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Cooper, B.S. (Manchester U.) et al.
Nuclear charge radii are sensitive probes of different aspects of the nucleon-nucleon interaction and the bulk properties of nuclear matter; thus, they provide a stringent test and challenge for nuclear theory. The calcium region has been of particular interest, as experimental evidence has suggested a new magic number at $N = 32$ [1-3], while the unexpectedly large increases in the charge radii [4,5] open new questions about the evolution of nuclear size in neutron-rich systems. [...]
arXiv:2012.01864.-
2021-01-28 - 5 p.
- Published in : Nature Phys.
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Quadrupole Moments of $^{29}$Mg and $^{33}$Mg
/ Yordanov, Deyan Todorov (Orsay, IPN ; Heidelberg, Max Planck Inst. ; CERN) ; Kowalska, Magdalena (CERN) ; Blaum, Klaus (Heidelberg, Max Planck Inst.) ; De Rydt, Marieke (Leuven U.) ; Flanagan, Kieran T. (Manchester U. ; Leuven U.) ; Himpe, Pieter (Leuven U.) ; Lievens, Peter (Leuven U.) ; Mallion, Stephen (Leuven U.) ; Neugart, Rainer (Heidelberg, Max Planck Inst. ; Mainz U., Inst. Kernchem.) ; Neyens, Gerda (Leuven U.) et al.
The quadrupole moments of 29Mg and 33Mg have been constrained by collinear laser spectroscopy at CERN-ISOLDE. The values are consistent with shell-model predictions, thus supporting the current understanding of light nuclei associated with the "island of inversion"..
arXiv:1905.05580.-
2019-06-12 - 4 p.
- Published in : Hyperfine Interact. 240 (2019) 67
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Measurement and microscopic description of odd-even staggering of charge radii of exotic copper isotopes
/ de Groote, R.P. (Leuven U. ; Jyvaskyla U.) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Day Goodacre, T. (CERN ; TRIUMF) ; Farooq-Smith, G.J. ; Fedorov, D.V. (St. Petersburg, INP) ; Flanagan, K.T. (Manchester U.) ; Franchoo, S. (Orsay, IPN) et al.
The mesoscopic nature of the atomic nucleus gives rise to a wide array of macroscopic and microscopic phenomena. The size of the nucleus is a window into this duality: while the charge radii globally scale as $A^{1/3}$, their evolution across isotopic chains reveals unanticipated structural phenomena [1-3]. [...]
arXiv:1911.08765.-
2020-04-13 - 5 p.
- Published in : Nature Phys. 16 (2020) 620-624
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Electromagnetic properties of indium isotopes illuminate the doubly magic character of $^{100}$Sn
/ Karthein, J. (MIT) ; Ricketts, C.M. (Manchester U.) ; Garcia Ruiz, R.F. (MIT ; Manchester U. ; CERN) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Dobaczewski, J. (York U., England ; Warsaw U.) ; Farooq-Smith, G.J. (Leuven U.) ; Flanagan, K.T. (Manchester U.) ; Georgiev, G. (IJCLab, Orsay) et al.
Our understanding of nuclear properties in the vicinity of $^{100}$Sn, suggested to be the heaviest doubly magic nucleus with equal numbers of protons (Z=50) and neutrons (N=50), has been a long-standing challenge for experimental and theoretical nuclear physics. Contradictory experimental evidence exists on the role of nuclear collectivity in this region of the nuclear chart. [...]
arXiv:2310.15093.-
2024-09-30 - 20 p.
- Published in : Nature Phys. 20 (2024) 1719-1725
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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
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Characterization of the shape-staggering effect in mercury nuclei
/ Marsh, B A (CERN) ; Day Goodacre, T (CERN ; Manchester U.) ; Sels, S (Leuven U.) ; Tsunoda, Y (Tokyo U., CNS) ; Andel, B (Comenius U.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Althubiti, N A (Manchester U.) ; Atanasov, D (Heidelberg, Max Planck Inst.) ; Barzakh, A E (St. Petersburg, INP) ; Billowes, J (Manchester U.) et al.
In rare cases, the removal of a single proton (Z) or neutron (N) from an atomic nucleus leads to a dramatic shape change. These instances are crucial for understanding the components of the nuclear interactions that drive deformation. [...]
2018 - 6 p.
- Published in : Nature Phys. 14 (2018) 1163-1167
Fulltext: PDF; External link: INTERACTIONS
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High-resolution laser spectroscopy of nickel isotopes
/ Cheal, Bradley (School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL) ; Billowes, Jon (School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL) ; Bissell, Mark (Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium) ; Blaum, Klaus (Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany) ; Campbell, Paul (School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL) ; Flanagan, Kieran (School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL) ; Garcia-Ruiz, Ronald (Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium) ; Geppert, Christopher (GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany) ; Heylen, Hanne (Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium) ; Kowalska, Magda (Physics Department, CERN, CH-1211 Geneva 23, Switzerland) et al.
CERN-INTC-2013-007 ; INTC-P-373.
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2013.
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Status report for the COLLAPS collaboration
/ Bissell, ML (School of Physics and Astronomy, The University of Manchester, Manchester, M13 9PL, UK) ; Heylen, H (Experimental Physics Department, CERN, Geneva, Switzerland) ; Vazquez-Rodriguez, L (Max-Plank-Institut fur Kernphysik, D-69117 Heidelberg, Germany) ; Xu, ZY (KU Leuven, Instituut voor Kern-en Stralingsfysica, B-3001 Leuven, Belgium)
CERN-INTC-2019-033 ; INTC-SR-090.
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2019.
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Analytic Response Relativistic Coupled-Cluster Theory: The first application to indium isotope shifts
/ Sahoo, B.K. (Ahmedabad, Phys. Res. Lab) ; Vernon, A.R. (Manchester U. ; Leuven U.) ; Garcia Ruiz, R.F. (CERN ; MIT) ; Binnersley, C.L. (Manchester U.) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Farooq-Smith, G.J. (Leuven U.) ; Flanagan, K.T. (Manchester U. ; U. Manchester (main)) ; Gins, W. (Leuven U.) et al.
With increasing demand for accurate calculation of isotope shifts of atomic systems for fundamental and nuclear structure research, an analytic energy derivative approach is presented in the relativistic coupled-cluster theory framework to determine the atomic field shift and mass shift factors. This approach allows the determination of expectation values of atomic operators, overcoming fundamental problems that are present in existing atomic physics methods, i.e. [...]
arXiv:1911.02812.-
2020-01-14 - 13 p.
- Published in : New J. Phys. 22 (2020) 012001
Fulltext: fulltext1763769 - PDF; 1911.02812 - PDF;
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