Z=50 shell gap near Sn100 from intermediate-energy coulomb excitations in even-mass Sn106-112 isotopes

C. Vaman, C. Andreoiu, D. Bazin, A. Becerril, B. A. Brown, C. M. Campbell, A. Chester, J. M. Cook, D. C. Dinca, A. Gade, D. Galaviz, T. Glasmacher, M. Hjorth-Jensen, M. Horoi, D. Miller, V. Moeller, W. F. Mueller, A. Schiller, K. Starosta, A. StolzJ. R. Terry, A. Volya, V. Zelevinsky, H. Zwahlen

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Abstract

Rare isotope beams of neutron-deficient Sn106,108,110 from the fragmentation of Xe124 were employed in an intermediate-energy Coulomb excitation experiment. The measured B(E2,01+→21+) values for Sn108 and Sn110 and the results obtained for the Sn106 show that the transition strengths for these nuclei are larger than predicted by current state-of-the-art shell-model calculations. This discrepancy might be explained by contributions of the protons from within the Z=50 shell to the structure of low-energy excited states in this region.

Original languageEnglish
Article number162501
JournalPhysical Review Letters
Volume99
Issue number16
DOIs
StatePublished - Oct 15 2007

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