Probing particle-phonon-coupled states in the neutron-rich nucleus Cu 65 by lifetime measurements with fast-timing techniques

Bocchi, GiovanniLeoni, SilviaBottoni, SimoneBenzoni, GiovannaBracco, AngelaBortignon, Pier FrancescoColò, GianlucaAydın, Sezgin13.07.20192019-07-1613.07.20192019-07-1620140556-2813https://dx.doi.org/10.1103/PhysRevC.89.054302https://hdl.handle.net/20.500.12451/2548The Cu65 nucleus was populated by the Ni64(Li7,?2n)Cu65 reaction and the lifetime of the 9/2+ state at 2.5 MeV was measured by electronic fast-timing technique, providing the value ?= 37(3) ps. The reduced transition probability B(E3)=8.82(165) W.u. is deduced and compared to theoretical predictions in the framework of a particle-vibration (weak) coupling model. The results indicate that the 9/2+ state is a member of the 3- - ?p3/2 multiplet, built by coupling the octupole 3- phonon of Ni64 to an unpaired proton in the p3/2 level, confirming the robustness of core excitations in the medium mass nucleus Ni64. © 2014 American Physical Society.eninfo:eu-repo/semantics/closedAccessProbing particle-phonon-coupled states in the neutron-rich nucleus Cu 65 by lifetime measurements with fast-timing techniquesArticle89510.1103/PhysRevC.89.054302N/AN/A