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Sub-Barrier Coulomb Excitation of ^110Sn and Its Implications for the ^100Sn Shell Closure

J. Cederkall ; A. Ekstrom ; C. Fahlander ; A. M. Hurst ; M. Hjorth-Jensen ; F. Ames ; A. Banu ; P. A. Butler ; T. Davinson ; U. Datta Pramanik ; J. Eberth ; S. Franchoo ; G. Georgiev ; M. Gorska ; D. Habs ; M. Huyse ; O. Ivanov ; J. Iwanicki ; O. Kester ; U. Köster ; B. A. Marsh ; O. Niedermaier ; Thomas Nilsson (Institutionen för fundamental fysik, Subatomär fysik) ; P. Reiter ; H. Scheit ; D. Schwalm ; T. Sieber ; G. Sletten ; I. Stefanescu ; J. Van de Walle ; P. Van Duppen ; N. Warr ; D. Weisshaar ; Fredrik Wenander
Physical Review Letters Vol. 98 (2007), 17, p. 172501.
[Artikel, refereegranskad vetenskaplig]

The first excited 2+ state of the unstable isotope 110Sn has been studied in safe Coulomb excitation at 2.82 MeV/u using the MINIBALL array at the REX-ISOLDE post accelerator at CERN. This is the first measurement of the reduced transition probability of this state using this method for a neutron deficient Sn isotope. The strength of the approach lies in the excellent peak-to-background ratio that is achieved. The extracted reduced transition probability, B(E2:0+-->2+)=0.220±0.022e2b2, strengthens the observation of the evolution of the B(E2) values of neutron deficient Sn isotopes that was observed recently in intermediate-energy Coulomb excitation of 108Sn. It implies that the trend of these reduced transition probabilities in the even-even Sn isotopes is not symmetric with respect to the midshell mass number A=116 as 100Sn is approached.

Nyckelord: Nuclear multipole matrix elements , Nuclear shell model, Coulomb excitation by heavy ions, Properties of nuclei with 90 <= A <= 149

Denna post skapades 2008-01-09. Senast ändrad 2014-09-02.
CPL Pubid: 65117


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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)



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