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

D.D. Dijulio, J. Cederkall, C. Fahlander, A. Ekström, M. Hjorth-Jensen, M. Albers, A. Blazhev, C. Fransen, K. Geibel, H. Hess, P. Reiter, M. Seidlitz, J. Taprogge, N. Warr, V. Bildstein, R. Gernhäuser, K. Wimmer, I. Darby, H. De Witte, J. DirikenT. Davinson, A. Görgen, S. Siem, G.M. Tveten, J. Iwanicki, R. Lutter, M. Scheck, J. Van De Walle, D. Voulot, F. Wenander

Research output: Contribution to journalArticlepeer-review

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 58Ni 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
JournalPhysical Review C
Volume86
Issue number3
DOIs
Publication statusPublished - 6 Sep 2012

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