Quadrupole collectivity beyond N=50 in neutron-rich Se and Kr isotopes

B. Elman, A. Gade, D. Weisshaar, D. Barofsky, D. Bazin, P.C. Bender, M. Bowry, M. Hjorth-Jensen, K.W. Kemper, S. Lipschutz, E. Lunderberg, N. Sachmpazidi, N. Terpstra, W.B. Walters, A. Westerberg, S.J. Williams, K. Wimmer

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16 Citations (Scopus)


We report B(E2;01+→2n+) strengths for the neutron-rich 88,90Kr and 86Se isotopes from intermediate-energy Coulomb excitation. The electric quadrupole transition strengths to the first 2+ states complete, with considerably improved uncertainties, the evolution of quadrupole collectivity in the Kr and Se isotopes approaching N=60, for which 90Kr and 86Se had previously been the most uncertain. We also report significant excitation strength to several higher-lying 2+ states in the krypton isotopes. This fragmentation of B(E2) strength in 88,90Kr confirms shell-model calculations in the π(fpg)-ν(sdgh) shell with an only minimally tuned shell-model setup that is based on a nucleon-nucleon interaction derived from effective field theory and effective charges adjusted to 86Kr.
Original languageEnglish
Article number044332
Number of pages8
JournalPhysical Review C
Issue number4
Publication statusPublished - 27 Oct 2017
Externally publishedYes


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