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1.
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Enhanced sensitivity for electron affinity measurements of rare elements
/ Maier, F M (Greifswald U. ; CERN ; TRIUMF ; Michigan State U.) ; Leistenschneider, E (CERN ; LBNL, NSD) ; Au, M (CERN) ; Bērziņš, U (Latvia U.) ; Gracia, Y N Vila (CERN) ; Hanstorp, D (U. Gothenburg (main)) ; Kanitz, C (CERN) ; Lagaki, V (Greifswald U. ; CERN) ; Lechner, S (CERN) ; Leimbach, D (CERN ; U. Gothenburg (main)) et al.
Abstract
The electron affinity (EA), the energy released when a neutral atom binds an additional electron, is a fundamental property of atoms that is governed by electron-electron correlations and is strongly related to an element’s chemical reactivity. However, conventional techniques for EA determination lack the experimental sensitivity to probe very scarce samples [...]
2025 - 12 p.
- Published in : Nature Commun. 16 (2025) 9576
Fulltext: PDF; External link: Interactions.org article
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2.
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Charge radii and electromagnetic moments of Bi214−218: Exploring the “southern” border of the Z>82 octupole-deformation region
/ Barzakh, A (Unlisted) ; Andreyev, A N (JAEA, Ibaraki ; York U., England) ; Yue, Z (York U., England) ; Nies, L (CERN) ; Seliverstov, M D (Unlisted) ; Cubiss, J G (York U., England) ; Algora, A (Valencia U., IFIC ; KLTE-ATOMKI) ; Andel, B (Comenius U.) ; Antalic, S (Comenius U.) ; Al Monthery, M (Unlisted, OM) et al.
The changes in the mean-squared charge radii relative to Bi126209 (δ〈r2〉N,126) and the magnetic dipole and electric quadrupole moments in Bi214−218 have been measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). Magnetic moments of odd-odd bismuth nuclei have been analyzed by the additivity relation. [...]
2025 - 10 p.
- Published in : Phys. Rev. C 112 (2025) 034304
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3.
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Variations in the charge radii of indium isotopes between $N$ = 52 and 82
/ CRIS-ISOLDE Collaboration
Measurements of the 5$\mathrm{p}$ $^2P_{3/2}$ $\to$ $9_s$ $^2 S_{1/2}$ and 5$\mathrm{p}$ $^2P_{1/2}$ $\to$ $8_s$ $^2 S_{1/2}$ transitions in the indium atom, combined with new atomic physics calculations, were used to extract the changes in mean-square nuclear charge radii, $\delta$($r^2$), of the indium (Z = 49) isotopes $^{101-111}$In, $^{113-123}$In, and $^{125-131}$In. With a proton hole in the closed nuclear shell of Z = 50, indium provides a detailed study of the effect of unpaired nucleons adjacent to the proton-shell closure, allowing investigation into the charge radii for isotopes between the two major neutron-shell closures at N = 50 and N = 82. [...]
2025 - 10 p.
- Published in : Phys. Rev. C 111 (2025) 064325
Fulltext: PDF;
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4.
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Reduction in nuclear size and quadrupole deformation of high-spin isomers of $^{127,129}$In
/ Vernon, A.R. (Manchester U. ; MIT ; Leuven U.) ; Binnersley, C.L. (Manchester U.) ; Garcia Ruiz, R.F. (MIT ; CERN) ; Lynch, K.M. (Manchester U. ; CERN) ; Miyagi, T. (Tsukuba U., CCS ; Darmstadt, Tech. U. ; Darmstadt, EMMI ; Heidelberg, Max Planck Inst. ; TRIUMF) ; Billowes, J. (Manchester U.) ; Bissell, M.L. (Manchester U.) ; Cocolios, T.E. (Leuven U.) ; Delaroche, J.P. (CEA DAM) ; Dobaczewski, J. (York U., England ; Warsaw U.) et al.
We employed laser spectroscopy of atomic transitions to measure the nuclear charge radii and electromagnetic properties of the high-spin isomeric states in neutron-rich indium isotopes (Z = 49) near the closed proton and neutron shells at Z = 50 and N = 82. Our data reveal a reduction in the nuclear charge radius and intrinsic quadrupole moment when protons and neutrons are fully aligned in 129In(N = 80), to form the high spin isomer. [...]
arXiv:2505.14977.-
2025-06-26 - 9 p.
- Published in : 10.1103/m35x-mw7z
Fulltext: PDF;
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5.
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6.
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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
Fulltext: PDF;
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7.
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Targets and ion sources at CERN-ISOLDE — Facilities and developments
/ Rothe, S (CERN) ; Au, M (CERN ; Mainz U.) ; Ballof, J (CERN ; Mainz U.) ; Barbero, E (CERN) ; Bissell, M (CERN) ; Boucherie, A (CERN) ; Bovigny, M (CERN) ; Chrysalidis, K (CERN) ; Crepieux, B (CERN) ; Cruikshank, J (CERN) et al.
At the CERN-ISOLDE radioactive ion beam facility, thick targets are irradiated using a beam of 1.4-GeV protons. One of ISOLDE’s key features is the large choice of ion source types and target materials available, enabling us to select the ideal combination for optimal intensity and purity of the isotopes requested by ISOLDE users. [...]
2023 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 542 (2023) 38-44
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022, pp.38-44
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8.
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Investigating radioactive negative ion production via double electron capture
/ Nichols, M (Goteborg, ITP) ; Athanasakis-Kaklamanakis, M (CERN ; Leuven U.) ; Borschevsky, A (Groningen U.) ; Cocolios, T E (Leuven U.) ; Crosa-Rossa, R (Groningen U.) ; de Groote, R P (Leuven U.) ; Flanagan, K T (Manchester U.) ; Ruiz, R F Garcia (MIT) ; Geldhof, S (Leuven U.) ; Hanstorp, D (Goteborg, ITP) et al.
The relative cross sections for radioactive negative ion production via double electron capture have been measured for collisions between a 40 keV projectile beam of uranium-238 and potassium vapor. This was performed at the collinear resonance ionization spectroscopy (CRIS) experiment at CERN-ISOLDE and is a step towards measuring the electron affinities (EAs) of elements that cannot be efficiently produced in negative ion sources at radioactive ion beam (RIB) facilities. [...]
2023 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 541 (2023) 264-267
Fulltext: PDF;
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022, pp.264-267
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9.
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Progress towards the FRIB-EDM3-Frontend: A tool to provide radioactive molecules from isotope harvesting for fundamental symmetry studies
/ Ballof, J (Michigan State U. ; CERN) ; Nusgart, N (Michigan State U.) ; Lalain, P (Michigan State U.) ; Au, M (CERN ; Mainz U.) ; Heinke, R (CERN) ; Leimbach, D (U. Gothenburg (main)) ; Stegemann, S (CERN) ; Schütt, M (CERN) ; Rothe, S (CERN) ; Singh, Jaideep T (Michigan State U.)
The under-construction FRIB-EDM3-instrument was designed to study polar radioactive molecules (such as RaF) in transparent cryogenic solids by laser spectroscopy. The instrument is divided into a frontend- and a backend section. [...]
CERN-ISOLDE-2024-005.-
2023 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 541 (2023) 224-227
Fulltext: PDF;
In : 19th International Conference on Electromagnetic Isotope Separators and Related Topics (EMIS 2022), Daejeon, Korea, 3 - 7 Oct 2022, pp.224-227
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10.
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In-source and in-trap formation of molecular ions in the actinide mass range at CERN-ISOLDE
/ Au, M. (CERN ; Mainz U.) ; Athanasakis-Kaklamanakis, M. (CERN ; Leuven U.) ; Nies, L. (CERN ; Greifswald U.) ; Ballof, J. (CERN ; Michigan State U., East Lansing (main) ; Philipps U. Marburg) ; Berger, R. (CERN) ; Chrysalidis, K. (CERN) ; Fischer, P. (Greifswald U.) ; Heinke, R. (CERN) ; Johnson, J. (Leuven U.) ; Köster, U. (CERN ; Laue-Langevin Inst.) et al.
The use of radioactive molecules for fundamental physics research is a developing interdisciplinary field limited dominantly by their scarce availability. In this work, radioactive molecular ion beams containing actinide nuclei extracted from uranium carbide targets are produced via the Isotope Separation On-Line technique at the CERN-ISOLDE facility. [...]
arXiv:2303.12215.-
2023-06-02 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 541 (2023) 375-379
Fulltext: 2303.12215 - PDF; Publication - PDF;
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