Physics Letters B (Sep 2021)

The (6+) isomer in 102Sn revisited: Neutron and proton effective charges close to the double shell closure

  • H. Grawe,
  • K. Straub,
  • T. Faestermann,
  • M. Górska,
  • C. Hinke,
  • R. Krücken,
  • F. Nowacki,
  • M. Böhmer,
  • P. Boutachkov,
  • H. Geissel,
  • R. Gernhäuser,
  • A. Gottardo,
  • J. Grȩbosz,
  • N. Kurz,
  • Z. Liu,
  • L. Maier,
  • S. Pietri,
  • Zs. Podolyák,
  • K. Steiger,
  • H. Weick,
  • H.J. Wollersheim,
  • P.J. Woods,
  • N. Al-Dahan,
  • N. Alkhomashi,
  • A. Ataç,
  • A. Blazhev,
  • N. Braun,
  • I. Čeliković,
  • T. Davinson,
  • I. Dillmann,
  • C. Domingo-Pardo,
  • P. Doornenbal,
  • G. Farrelly,
  • F. Farinon,
  • G. de France,
  • J. Gerl,
  • N. Goel,
  • T. Habermann,
  • R. Hoischen,
  • R. Janik,
  • M. Karny,
  • A. Kaşkaş,
  • I. Kojouharov,
  • Th. Kröll,
  • M. Lewitowicz,
  • Yu.A. Litvinov,
  • S. Myalski,
  • F. Nebel,
  • S. Nishimura,
  • C. Nociforo,
  • J. Nyberg,
  • A. Parikh,
  • A. Procházka,
  • P.H. Regan,
  • C. Rigollet,
  • H. Schaffner,
  • C. Scheidenberger,
  • S. Schwertel,
  • P.-A. Söderström,
  • S. Steer,
  • A. Stolz,
  • P. Strmeň

Journal volume & issue
Vol. 820
p. 136591

Abstract

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In a high-energy fragmentation experiment at GSI an I=π(6+) isomer and its γ-decay are identified in 102Sn, the two-neutron neighbour of the doubly-magic 100Sn. Its half-life is measured to be T=1/2367(11) ns. The possible existence of further isomers is discussed in the framework of large-scale shell model (LSSM) calculations including up to five particle-hole excitations of the 100Sn core. From the precise B(E2; 6+→4+) strength and the recently remeasured value for B(E2; 8+→6+) in the two-proton hole neighbour 98Cd effective E2 polarization charges for protons and neutrons were inferred including LSSM corrections within the full N=4 0ħω space. The results are discussed in comparison to predicted and empirically determined effective operators.

Keywords