0(gs)+ -->2(1)+ transition strengths in 106Sn and 108Sn.
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift
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.
Detaljer
Författare | |
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Enheter & grupper | |
Forskningsområden | Ämnesklassifikation (UKÄ) – OBLIGATORISK
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Originalspråk | engelska |
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Artikelnummer | 012502 |
Tidskrift | Physical Review Letters |
Volym | 101 |
Utgåva nummer | 1 |
Status | Published - 2008 |
Publikationskategori | Forskning |
Peer review utförd | Ja |