CERN Accelerating science

Article
Title Competition between pairing correlations and deformation from the odd-even mass staggering of francium and radium isotopes
Author(s) Kreim, S (CERN ; Heidelberg, Max Planck Inst.) ; Beck, D (Darmstadt, GSI) ; Blaum, K (Heidelberg, Max Planck Inst.) ; Borgmann, Ch (Heidelberg, Max Planck Inst.) ; Breitenfeldt, M (Leuven U.) ; Cocolios, T E (CERN) ; Gottberg, A (CERN) ; Herfurth, F (Darmstadt, GSI) ; Kowalska, M (CERN) ; Litvinov, Yu A (Darmstadt, GSI) Zeige alle 21 Autoren
Publication 2014
Number of pages 10
In: Phys. Rev. C 90 (2014) 024301
DOI 10.1103/PhysRevC.90.024301
Subject category Nuclear Structure ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN ISOLDE
Abstract The masses of Fr222,224,226–233 and Ra233,234 have been determined with the Penning-trap mass spectrometer ISOLTRAP at the ISOLDE facility at CERN, including the previously unknown mass and half-life of Fr233. We study the evolution of the odd-even staggering of binding energies along the francium and radium isotopic chains and of its lowest-order estimator, Δ3(N). An enhancement of the staggering of Δ3(N) is observed towards neutron number N=146, which points to contributions beyond pairing correlations. These contributions are investigated in the Hartree-Fock and Hartree-Fock-Bogoliubov approaches, emphasizing the connections to the single-particle level density and nuclear deformation.
Copyright/License Publication: © 2014-2025 American Physical Society

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