<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mn>0</mml:mn><mml:mi>gs</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:mo>→</mml:mo><mml:msubsup><mml:mn>2</mml:mn><mml:mn>1</mml:mn><mml:mo>+</mml:mo></mml:msubsup></mml:math>Transition Strengths in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Sn</mml:mi><mml:mprescripts/><mml:none/><mml:mn>106</mml:mn></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Sn</mml:mi><mml:mprescripts/><mml:none/><mml:mn>108</mml:mn></mml:mmultiscripts></mml:math>

2008105 citationsJournal Article

Authors

A. Ekström · Lund University

J. Cederkäll · European Organization for Nuclear Research

C. Fahlander · Institute of Nuclear Physics

M. Hjorth‐Jensen · University of Oslo

F. Ames · TRIUMF

P. A. Butler · University of Liverpool

T. Davinson

Abstract

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.

Topics & Keywords

Nuclear physics research studies Astronomical and nuclear sciences Nuclear Physics and Applications

Publication Details

Published in: Physical Review Letters

Volume 101, Issue 1, pp. 012502-012502

DOI: 10.1103/physrevlett.101.012502

Field-Weighted Citation Impact: 12.89

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Publication Details