0(gs)+ -->2(1)+ transition strengths in 106Sn and 108Sn.

Research output: Contribution to journalArticle


The reduced transition probabilities, B(E2; 0(gs)+ -->2(1)+), have been measured in the radioactive isotopes (108,106)Sn using subbarrier Coulomb excitation at the REX-ISOLDE facility at CERN. Deexcitation gamma rays were detected by the highly segmented MINIBALL Ge-detector array. The results, B(E2;0(gs)+ -->2(1)+)=0.222(19)e2b2 for 108Sn and B(E2; 0(gs)+-->2(1)+)=0.195(39)e2b2 for 106Sn were determined relative to a stable 58Ni target. The resulting B(E2) values are approximately 30% larger than shell-model predictions and deviate from the generalized seniority model. This experimental result may point towards a weakening of the N=Z=50 shell closure.


  • Andreas Ekström
  • M Hjorth-Jensen
  • F Ames
  • P A Butler
  • T Davinson
  • J Eberth
  • F Fincke
  • A Görgen
  • M Górska
  • D Habs
  • A M Hurst
  • M Huyse
  • O Ivanov
  • J Iwanicki
  • O Kester
  • U Köster
  • B A Marsh
  • J Mierzejewski
  • P Reiter
  • H Scheit
  • D Schwalm
  • S Siem
  • G Sletten
  • I Stefanescu
  • G M Tveten
  • J Van de Walle
  • P Van Duppen
  • D Voulot
  • N Warr
  • D Weisshaar
  • F Wenander
  • M Zielińska
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number012502
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 2008
Publication categoryResearch