Excitation strengths in Sn-109: Single-neutron and collective excitations near Sn-100

D. D. DiJulio, J. Cederkall, C. Fahlander, A. Ekstrom, M. Hjorth-Jensen, M. Albers, V. Bildstein, A. Blazhev, I. Darby, T. Davinson, H. De Witte, J. Diriken, Ch. Fransen, K. Geibel, R. Gernhaeuser, A. Gorgen, H. Hess, J. Iwanicki, R. Lutter, P. ReiterM. Scheck, M. Seidlitz, S. Siem, J. Taprogge, G.M. Tveten, J. Van de Walle, D. Voulot, N. Warr, F. Wenander, K. Wimmer

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10 Citations (Scopus)

Abstract

A set of B(E2) values for the low-lying excited states in the radioactive isotope
109Sn were deduced from a Coulomb excitation experiment. The 2.87-MeV/u
radioactive beam was produced at the REX-ISOLDE facility at CERN and was incident on a secondary 58Ni target. The B(E2) values were determined using the known 2+→0+ reduced transition probability in 58 Ni as normalization with the semiclassical Coulomb excitation code gosia2. The transition probabilities are compared to shell-model calculations based on a realistic nucleon-nucleon interaction and the predictions of a simple core-excitation model. This measurement represents the first determination of multiple B(E2)
values in a light Sn nucleus using the Coulomb excitation technique with low-energy radioactive beams. The results provide constraints for the single-neutron states relative to 100Sn and also indicate the importance of both single-neutron and collective excitations in the light Sn isotopes.
Original languageEnglish
Article number031302
JournalPhysical Review C
Volume86
Issue number3
DOIs
Publication statusPublished - Sep 2012
Externally publishedYes

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