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1.
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The PUMA offline ion source beamline
/ Schlaich, Moritz (Darmstadt, Tech. U.) ; Fischer, Paul (Greifswald U.) ; Giesel, Paul Florian (Greifswald U.) ; Klink, Clara (Darmstadt, Tech. U. ; CERN) ; Obertelli, Alexandre (Darmstadt, Tech. U.) ; Schweikhard, Lutz (Greifswald U.) ; Wienholtz, Frank (Darmstadt, Tech. U.)
The antiProton Unstable Matter Annihilation experiment (PUMA) at CERN aims to study the nucleonic composition in the matter density tail of stable and radioactive nuclei using low-energy antiprotons. Since there is no facility in which both low-energy antiprotons and radioactive nuclei can be produced, the experimental realization with exotic nuclei requires the transportation of the antiprotons from the Extra Low ENergy Antiproton (ELENA) facility to the nearby located Isotope mass Separator On-Line DEvice (ISOLDE). [...]
arXiv:2504.08870.-
2025-07-12 - 12 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1080 (2025) 170812
Fulltext: Publication - PDF; 2504.08870 - PDF;
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2.
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Production and purification of molecular $^{225}$Ac at CERN-ISOLDE
/ Au, M (CERN ; U. Mainz, PRISMA) ; Nies, L (CERN ; Greifswald U.) ; Stegemann, S (CERN) ; Athanasakis-Kaklamanakis, M (CERN ; Leuven U. ; Imperial Coll., London) ; Cocolios, T E (CERN ; Leuven U.) ; Fischer, P (Greifswald U.) ; Giesel, P F (Greifswald U.) ; Johnson, J D (Leuven U.) ; Köster, U (CERN ; Laue-Langevin Inst.) ; Lange, D (Heidelberg, Max Planck Inst.) et al.
The radioactive nuclide $^{225}$Ac is one of the few promising candidates for cancer treatment by targeted-$\alpha$-therapy, but worldwide production of $^{225}$Ac faces significant limitations. In this work, the Isotope Separation On-Line method was used to produce actinium by irradiating targets made of uranium carbide and thorium carbide with 1.4-GeV protons. [...]
2024 - 13 p.
- Published in : J. Radioanal. Nucl. Chem. 334 (2025) 367-379
Fulltext: PDF;
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3.
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Refining the nuclear mass surface with the mass of $^{103}$Sn
/ Nies, L. (CERN ; Greifswald U.) ; Atanasov, D. (LP2I, Bordeaux) ; Athanasakis-Kaklamanakis, M. (CERN ; Leuven U.) ; Au, M. (CERN ; Mainz U.) ; Bernerd, C. (CERN) ; Blaum, K. (Heidelberg, Max Planck Inst.) ; Chrysalidis, K. (CERN) ; Fischer, P. (Greifswald U.) ; Heinke, R. (CERN) ; Klink, C. (CERN ; Darmstadt, Tech. U.) et al.
Mass measurements with the ISOLTRAP mass spectrometer at CERN-ISOLDE improve mass uncertainties of neutron-deficient tin isotopes towards doubly-magic $^{100}$Sn. The mass uncertainty of $^{103}$Sn was reduced by a factor of 4, and the new value for the mass excess of -67104(18) keV is compared with nuclear \textit{ab initio} and density functional theory calculations. [...]
arXiv:2410.17995.-
2025-01-09 - 11 p.
- Published in : Phys. Rev. C 111 (2025) 014315
Fulltext: 2410.17995 - PDF; Publication - PDF;
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4.
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Simulations of a cryogenic, buffer-gas filled Paul trap for low-emittance ion bunches
/ Lechner, S (CERN ; Vienna, Tech. U. ; McGill U.) ; Sels, S (CERN) ; Belosevic, I (TRIUMF) ; Buchinger, F (McGill U.) ; Fischer, P (Greifswald U.) ; Kanitz, C (Erlangen - Nuremberg U.) ; Lagaki, V (CERN ; Greifswald U.) ; Maier, F M (CERN ; Greifswald U.) ; Plattner, P (CERN ; Innsbruck U.) ; Schweikhard, L (Greifswald U.) et al.
Many experiments with pulsed ion beams benefit from or even require ion bunches with both small temporal width as well as small energy spread. To achieve optimal ion-beam preparation, a buffer-gas filled cryogenic Paul trap is being developed in the context of the Multi Ion Reflection Apparatus for Collinear Laser Spectroscopy (MIRACLS). [...]
2024 - 13 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1065 (2024) 169471
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5.
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Testing the mass separation capabilities of the new ISOLDE isobar separator
/ Nies, L (CERN, Switzerland) ; Fischer, P (University of Greifswald, Germany) ; Giesel, P F (University of Greifswald, Germany) ; Lange, D (MPIK, Germany) ; Lechner, S (CERN, Switzerland) ; Maier, F M (FRIB, USA) ; Malbrunot-Ettenauer, S (TRIUMF, Canada) ; Roitman, A (McGill University, Canada) ; Schmidt, A (Technical University of Darmstadt, Germany) ; Schweikhard, L (University of Greifswald, Germany) et al.
CERN-INTC-2024-043 ; INTC-I-279.
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2024.
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6.
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A multi-reflection time-of-flight mass spectrometer for the offline ion source of the PUMA experiment
/ Schlaich, M. (Darmstadt, Tech. Hochsch.) ; Fischer, J. (Darmstadt, Tech. Hochsch.) ; Fischer, P. (Greifswald U.) ; Klink, C. (Darmstadt, Tech. Hochsch.) ; Obertelli, A. (Darmstadt, Tech. Hochsch.) ; Schmidt, A. (Darmstadt, Tech. Hochsch.) ; Schweikhard, L. (Greifswald U.) ; Wienholtz, F. (Darmstadt, Tech. Hochsch.)
The antiProton Unstable Matter Annihilation experiment (PUMA) at CERN aims at investigating the nucleon composition in the matter density tail of radioactive as well as stable isotopes by use of low-energy antiproton-nucleon annihilation processes. For this purpose, antiprotons provided by the Extra Low ENergy Antiproton (ELENA) facility will be trapped together with the ions of interest. [...]
arXiv:2311.16150.-
2023-10-31 - 9 p.
- Published in : Int. J. Mass Spectrometry 495 (2024) 117166
Fulltext: PDF;
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7.
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Further evidence for shape coexistence in $^{79}$Zn$^{m}$ near doubly-magic $^{78}$Ni
/ Nies, L. (CERN ; Greifswald U.) ; Canete, L. (Jyvaskyla U. ; Surrey U.) ; Dao, D.D. (Strasbourg, IPHC) ; Giraud, S. (GANIL) ; Kankainen, A. (Jyvaskyla U.) ; Lunney, D. (IJCLab, Orsay) ; Nowacki, F. (Strasbourg, IPHC) ; Bastin, B. (GANIL) ; Stryjczyk, M. (Jyvaskyla U.) ; Ascher, P. (LP2I, Bordeaux) et al.
Isomers close to doubly-magic $^{78}_{28}$Ni$_{50}$ provide essential information on the shell evolution and shape coexistence near the ${Z=28}$ and ${N=50}$ double shell closure. We report the excitation energy measurement of the $1/2^{+}$ isomer in $^{79}_{30}$Zn$_{49}$ through independent high-precision mass measurements with the JYFLTRAP double Penning trap and with the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer. [...]
arXiv:2310.16915.-
2023-11-30 - 10 p.
- Published in : Phys. Rev. Lett.
- Published in : Phys. Rev. Lett.
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Increased beam energy as a pathway towards a highly selective and high-flux MR-ToF mass separator
/ Maier, F M (CERN ; Greifswald U.) ; Buchinger, F (McGill U.) ; Croquette, L (McGill U.) ; Fischer, P (Greifswald U.) ; Heylen, H (CERN) ; Hummer, F (CERN ; McGill U.) ; Kanitz, C (CERN) ; Kwiatkowski, A A (TRIUMF) ; Lagaki, V (CERN) ; Lechner, S (CERN ; McGill U.) et al.
Many experiments at radioactive ion beam (RIB) facilities suffer from isobaric contamination, i.e. unwanted
ions of similar mass. [...]
2023 - 17 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1056 (2023) 168545
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