Abstract

In recent work, candidates for two-phonon octupole excitations in have been identified based on the observation of a cascade of E3 decays and on the rates of de-exciting E1 transitions. To gain greater understanding of E1 transition rates in this region, , a nucleus with a neutron hole coupled to the octupole vibrational core of , has been examined. The status of the search for the two-phonon octupole quartet in is presented, and outstanding questions are highlighted.

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