Evolution of collectivity near mid-shell from excited-state lifetime measurements in rare earth nuclei

V. Werner, N. Cooper, J. M. Régis, M. Rudigier, E. Williams, J. Jolie, R. B. Cakirli, R. F. Casten, T. Ahn, V. Anagnostatou, Z. Berant, M. Bonett-Matiz, M. Elvers, A. Heinz, G. Ilie, D. Radeck, D. Savran, M. K. Smith

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    13 Citations (Scopus)

    Abstract

    The B(E2) excitation strength of the first excited 2+ state in even-even nuclei should directly correlate with the size of the valence space and maximize at mid-shell. A previously found saturation of B(E2) strengths in well-deformed rotors at mid-shell is tested through high-precision measurements of the lifetimes of the lowest-lying 2+ states of the Hf168 and W174 rare earth isotopes. Measurements were performed using fast LaBr3 scintillation detectors. Combined with the recently remeasured B(E2;21+→01+) values for Hf and W isotopes the new data remove discrepancies observed in the differentials of B(E2) values for these isotopes.

    Original languageEnglish
    Article number034323
    JournalPhysical Review C
    Volume93
    Issue number3
    DOIs
    Publication statusPublished - 18 Mar 2016

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