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Competition between pairing correlations and deformation from the odd-even mass staggering of francium and radium isotopes

Abstract : The masses of Fr-222,Fr-224,Fr-226-233 and Ra-233,Ra-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 Fr-233. 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, Delta(3)(N). An enhancement of the staggering of Delta(3)(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.
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http://hal.in2p3.fr/in2p3-01059129
Contributor : Christine Hadrossek <>
Submitted on : Friday, August 29, 2014 - 1:53:37 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:31 PM

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S. Kreim, D. Beck, K. Blaum, Ch. Borgmann, M. Breitenfeldt, et al.. Competition between pairing correlations and deformation from the odd-even mass staggering of francium and radium isotopes. Physical Review C, American Physical Society, 2014, 90, pp.024301. ⟨10.1103/PhysRevC.90.024301⟩. ⟨in2p3-01059129⟩

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