Penning-trap mass spectrometry and mean-field study of nuclear shape 
coexistence in the neutron-deficient lead region

Manea, Vladimir; Ascher, Pauline; Atanasov, Dinko; Barzakh, A.E.; Beck, D.; Blaum, Klaus; Borgmann, Christopher; Breitenfeldt , M.; Cakirli, R. Burcu; Cocolios, T. E.; Goodacre, T. Day; Fedorov, D. V.; Fedosseev, V. N.; George, Sebastian; Herfurth, F.; Kowalska, M.; Kreim, Susanne Waltraud; Litvinov, Yu. A.; Lunney, D.; Marsh, B.; Neidherr, D.; Rosenbusch, M.; Rossel, R. E.; Rothe, S.; Schweikhard, L.; Wienholtz, F.; Wolf, R. N.; Zuber, K.

doi:10.1103/PhysRevC.95.054322

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Penning-trap mass spectrometry and mean-field study of nuclear shape coexistence in the neutron-deficient lead region

MPG-Autoren

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Manea, Vladimir
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France;

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Ascher, Pauline
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Atanasov, Dinko
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum, Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Borgmann, Christopher
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Cakirli, R. Burcu
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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George, Sebastian
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Kreim, Susanne Waltraud
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
CERN, CH-1211 Geneva, Switzerland;

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Zitation

Manea, V., Ascher, P., Atanasov, D., Barzakh, A., Beck, D., Blaum, K., et al. (2017). Penning-trap mass spectrometry and mean-field study of nuclear shape coexistence in the neutron-deficient lead region. Physical Review C, 95: 054322. doi:10.1103/PhysRevC.95.054322.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-53F5-A

Zusammenfassung

We present a study of nuclear shape coexistence in the region of neutron-deficient lead isotopes. The midshell gold isotopes ^{180,185,188,190}Au (Z=79), the two long-lived nuclear states in ¹⁹⁷At (Z=85), and the neutron-rich nuclide ²¹⁹At were produced by the ISOLDE facility at CERN and their masses were determined with the high-precision Penning-trap mass spectrometer ISOLTRAP. The studied gold isotopes address the trend of binding energies in a region of the nuclear chart where the nuclear charge radii show pronounced discontinuities. Significant deviations from the atomic-mass evaluation were found for ^188,190Au. The new trend of two-neutron separation energies is smoother, although it does reveal the onset of deformation. The origin of this effect is interpreted in connection to the odd-even staggering of binding energies, as well as theoretically by Hartree-Fock-Bogoliubov calculations including quasiparticle blocking. The role of blocking for reproducing the large odd-even staggering of charge radii in the mercury isotopic chain is illustrated.