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Ionization potential of radium monofluoride
/ Wilkins, S.G. (MIT) ; Perrett, H.A. (Manchester U.) ; Udrescu, S.M. (MIT) ; Kyuberis, A.A. (U. Groningen, VSI) ; Pašteka, L.F. (U. Groningen, VSI ; Comenius U.) ; Au, M. (CERN ; Mainz U.) ; Belošević, I. (MIT ; TRIUMF) ; Berger, R. (Philipps U. Marburg) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) et al.
The ionization potential (IP) of radium monofluoride (RaF) was measured to be 4.969(2)[10] eV, revealing a relativistic enhancement in the series of alkaline earth monofluorides. [...]
arXiv:2408.14673.
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10.
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Precision spectroscopy and laser-cooling scheme of a radium-containing molecule
/ Udrescu, S M (MIT) ; Wilkins, S G (MIT) ; Breier, A A (Kassel U.) ; Athanasakis-Kaklamanakis, M (CERN ; Leuven U.) ; Ruiz, R F Garcia (MIT) ; Au, M (CERN ; Mainz U.) ; Belošević, I (TRIUMF) ; Berger, R (Philipps U. Marburg) ; Bissell, M L (Manchester U.) ; Binnersley, C L (Manchester U.) et al.
Molecules containing heavy radioactive nuclei are predicted to be extremely sensitive to violations of the fundamental symmetries of nature. The nuclear octupole deformation of certain radium isotopes massively boosts the sensitivity of radium monofluoride molecules to symmetry-violating nuclear properties. [...]
2024 - 14 p.
- Published in : Nature Phys. 20 (2024) 202-207
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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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Nuclear moments of indium isotopes reveal abrupt change at magic number 82
/ Vernon, A R (Manchester U. ; MIT ; Leuven U.) ; Garcia Ruiz, R F (MIT ; CERN) ; Miyagi, T (TRIUMF) ; Binnersley, C L (Manchester U.) ; Billowes, J (Manchester U.) ; Bissell, M L (Manchester U.) ; Bonnard, J (York U., England) ; Cocolios, T E (Leuven U.) ; Dobaczewski, J (York U., England) ; Farooq-Smith, G J (Leuven U.) et al.
In spite of the high-density and strongly correlated nature of the atomic nucleus, experimental and theoretical evidence suggests that around particular ‘magic’ numbers of nucleons, nuclear properties are governed by a single unpaired nucleon$^{1,2}$. A microscopic understanding of the extent of this behaviour and its evolution in neutron-rich nuclei remains an open question in nuclear physics$^{3–5}$. [...]
2022 - 10 p.
- Published in : Nature
Fulltext: PDF;
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5.
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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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A compact RFQ cooler buncher for CRIS experiments
/ Cooper, B S (Manchester U.) ; A Perrett, H (Manchester U.) ; Ricketts, C M (Manchester U.) ; Read, C (Manchester U.) ; Edwards, G (Manchester U.) ; Flanagan, K T (Manchester U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Cocolios, T E (Leuven U.) et al.
A compact radio frequency cooler buncher (RFQCB) is currently in development between The University of Manchester, KU Leuven and CERN. The device will be installed as part of the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at the Isotope separator On-line device (ISOLDE) at CERN. [...]
2019 - 8 p.
- Published in : Hyperfine Interact. 240 (2019) 52
Fulltext from Publisher: PDF;
In : 7th International Conference on Trapped Charged Particles and Fundamental Physics, Takamatsu, Japan, 30 Sep - 5 Oct 2018, pp.52
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7.
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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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Isotope Shifts of Radium Monofluoride Molecules
/ Udrescu, S.M. (MIT) ; Brinson, A.J. (MIT) ; Ruiz, R.F. Garcia (MIT ; CERN) ; Gaul, K. (Philipps U. Marburg) ; Berger, R. (Philipps U. Marburg) ; Billowes, J. (Manchester U.) ; Binnersley, C.L. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Breier, A.A. (Kassel U.) ; Chrysalidis, K. (CERN) et al.
Isotope shifts of $^{223-226,228}$Ra$^{19}$F were measured for different vibrational levels in the electronic transition $A^{2}{}{\Pi}_{1/2}\leftarrow X^{2}{}{\Sigma}^{+}$. The observed isotope shifts demonstrate the particularly high sensitivity of radium monofluoride to nuclear size effects, offering a stringent test of models describing the electronic density within the radium nucleus. [...]
arXiv:2105.10549.-
2021-07-14 - 7 p.
- Published in : Phys. Rev. Lett. 127 (2021) 033001
Fulltext: 2105.10549 - PDF; PhysRevLett.127.033001 - PDF; Fulltext from publisher: PDF;
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9.
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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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A compact linear Paul trap cooler buncher for CRIS
/ Ricketts, C M (Manchester U.) ; Cooper, B S (Manchester U.) ; Edwards, G (Manchester U.) ; Perrett, H A (Manchester U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Cocolios, T E (Leuven U.) ; Flanagan, K T (Manchester U.) ; Garcia Ruiz, R F (CERN) ; de Groote, R P (Jyvaskyla U.) et al.
A gas-filled linear Paul trap for the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at ISOLDE, CERN is currently under development. The trap is designed to accept beam from both ISOLDE target stations and the CRIS stable ion source. [...]
2020 - 3 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 463 (2020) 375-377
In : 18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland, 16 - 21 Sep 2018, pp.375-377
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