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Nuclear charge radii of germanium isotopes around $N$ = 40
/ Wang, S.J. (Peking U., SKLNPT) ; Kanellakopoulos, A. (Leuven U.) ; Yang, X.F. (Peking U., SKLNPT ; Leuven U.) ; Bai, S.W. (Peking U., SKLNPT) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Cheal, B. (Manchester U.) ; Devlin, C.S. (Manchester U.) ; Garcia Ruiz, R.F. (MIT ; CERN) et al.
Collinear laser spectroscopy measurements were performed on $^{68-74}$Ge isotopes ($Z = 32$) at ISOLDE-CERN, by probing the $4s^2 4p^2 \, ^3\!P_1 \rightarrow 4s^2 4p 5s \, ^3\!P_1^o$ atomic transition (269~nm) of germanium. Nuclear charge radii are determined via the measured isotope shifts, revealing a larger local variation than the neighboring isotopic chains. [...]
arXiv:2404.06046.-
2024-07-11 - 6 p.
Fulltext: Publication - PDF; 2404.06046 - PDF;
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Radiative lifetime of the A 2Π1/2 state in RaF with relevance to laser cooling
/ ISOLDE Collaboration
The radiative lifetime of the $A$$^2 \Pi_{1/2}$ (v=0) state in radium monofluoride (RaF) is measured to be 35(1) ns. The lifetime of this state and the related decay rate $\Gamma = 2.86(8) \times 10^7$$s^{-1}$ are of relevance to the laser cooling of RaF via the optically closed $A$$^2 \Pi_{1/2} \leftarrow X$$^2\Sigma_{1/2}$ transition, which makes the molecule a promising probe to search for new physics. [...]
arXiv:2403.09336.-
2024-07-22 - 8 p.
- Published in : Phys. Rev. A 110 (2024) L010802
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CEPC Technical Design Report: Accelerator
/ CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). [...]
arXiv:2312.14363; IHEP-CEPC-DR-2023-01; IHEP-AC-2023-01.-
2024-06-03 - 1106 p.
- Published in : Radiat. Detect. Technol. Methods 8 (2024) 1-1105
Fulltext: 2312.14363 - PDF; Publication - PDF;
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5.
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High-resolution laser spectroscopy of light gold isotopes: investigation of \lq\lq island of deformation'' and shape coexistence
/ Yang, XiaoFei (School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China) ; Bai, ShiWei (School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China) ; Neyens, Gerda (KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium)
CERN-INTC-2023-044 ; INTC-P-667.
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2023.
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Production test of Ti isotopes towards laser spectroscopy experiments
/ Plattner, Peter (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany) ; Bai, Shiwei (School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China) ; Blaum, Klaus (Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany) ; Cheal, Bradley (Oliver Lodge Laboratory, University of Liverpool, UK) ; Garc\'ia Ru\'iz, Ronald (Massachusetts Institute of Technology, Cambridge, MA, USA) ; Imgram, Phillip (Instituut voor Kern- en Stralingsfysica, KU Leuven, Leuven, Belgium) ; K\"onig, Kristian (Institut f\"ur Kernphysik, Technische Universit\"at Darmstadt, Darmstadt, Germany) ; Lellinger, Tim (Institut f\"ur Kernphysik, Technische Universit\"at Darmstadt, Darmstadt, Germany) ; Minamisono, Kei (Michigan State University, East Lansing, MI, USA) ; M\"uller, Patrick (Institut f\"ur Kernphysik, Technische Universit\"at Darmstadt, Darmstadt, Germany) et al.
CERN-INTC-2023-039 ; INTC-I-255.
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2023.
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7.
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Laser spectroscopy of neutron-deficient thulium isotopes
/ Cheal, Bradley (Oliver Lodge Laboratory, University of Liverpool, UK.) ; Rodriguez, Liss (Experimental Physics Department, CERN, Geneva, Switzerland / Max-Planck-Institut fur Kernphysik, Heidelberg, Germany.) ; Bai, Shiwei (School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking Uni- versity, Beijing, China.) ; Blaum, Klaus (Max-Planck-Institut fu ̈r Kernphysik, Heidelberg, Germany.) ; Campbell, Paul (School of Physics and Astronomy, The University of Manchester, Manchester, UK.) ; Garcia Ruiz, Ronald (Massachusetts Institute of Technology, Cambridge, MA, USA.) ; Imgram, Philip (Institut fur Kernphysik, Technische Universitat Darmstadt, Darmstadt, Germany.) ; Koenig, Kristian (Institut fur Kernphysik, Technische Universitat Darmstadt, Darmstadt, Germany.) ; Lellinger, Tim (Experimental Physics Department, CERN, Geneva, Switzerland / Institut fur Kernphysik, Technische Universitat Darmstadt, Darmstadt, Germany.) ; Muller, Patrick (Institut fur Kernphysik, Technische Universitat Darmstadt, Darmstadt, Germany.) et al.
CERN-INTC-2022-041 ; INTC-I-245.
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2022.
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Electromagnetic moments of scandium isotopes and $N=28$ isotones in the distinctive $0f_{7/2}$ orbit
/ Bai, S.W. (Peking U., SKLNPT) ; Koszorús, Á. (Leuven U. ; Liverpool U.) ; Hu, B.S. (Peking U., SKLNPT ; TRIUMF) ; Yang, X.F. (Peking U., SKLNPT) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Campbell, P. (Manchester U.) ; Cheal, B. (Liverpool U.) et al.
The electric quadrupole moment of $^{49}$Sc was measured by collinear laser spectroscopy at CERN-ISOLDE to be $Q_{\rm s}=-0.159(8)$$e$b, and a nearly tenfold improvement in precision was reached for the electromagnetic moments of $^{47,49}$Sc. The single-particle behavior and nucleon-nucleon correlations are investigated with the electromagnetic moments of $Z=21$ isotopes and $N=28$ isotones as valence neutrons and protons fill the distinctive $0f_{7/2}$ orbit, respectively, located between magic numbers, 20 and 28. [...]
arXiv:2203.09111.-
2022-04-02 - 8 p.
- Published in : Phys. Lett. B 829 (2022) 137064
Fulltext: Publication - PDF; 2203.09111 - PDF;
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Tin resonance-ionization schemes for atomic- and nuclear-structure studies
/ Gustafsson, F P (Leuven U.) ; Ricketts, C M (Manchester U.) ; Reitsma, M L (U. Groningen, VSI) ; Garcia Ruiz, R F (CERN ; MIT) ; Bai, S W (Peking U., SKLNPT) ; Berengut, J C (Heidelberg, Max Planck Inst. ; New South Wales U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Borschevsky, A (U. Groningen, VSI) ; Cocolios, T E (Leuven U.) et al.
This paper presents high-precision spectroscopic measurements of atomic tin using five different resonanceionization schemes performed with the collinear resonance-ionization spectroscopy technique. Isotope shifts were measured for the stable tin isotopes from the $5s^2 5p^2$ $^3P_{0,1,2}$ and $^1S_0$ to the $5s^2 5p6s ^1P_1, ^3P_{1,2}$ and $5s^2 5p7s^1 P_1$ atomic levels. [...]
2020 - 13 p.
- Published in : Phys. Rev. A 102 (2020) 052812
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10.
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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.
Fulltext: PDF; Fulltext from publisher: PDF;
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