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  • Lifetime of the ( 15 2 1 − ...
    Simpson, G; Regis, J M; Bettermann, L; Genevey, J; Jolie, J; Köster, U; Materna, T; Malkiewicz, T; Muraz, J-F; Pinston, J A; Roussiere, B; Thiamova, G

    Journal of physics. G, Nuclear and particle physics, 05/2019, Letnik: 46, Številka: 6
    Journal Article

    The lifetime of the ( 15 2 1 − ) state of 135Te has been measured to be τ = 809(22) ps, corresponding to a reduced transition rate of B ( E 2 ; 15 2 1 − → 11 2 1 − ) =6.6(2) W.u. The experiment was performed at the focal point of the Lohengrin spectrometer and s-delayed γ rays from mass-selected A = 135 ions were detected by four LaBr3(Ce) scintillators. This allowed the fast-timing technique to be used to access lifetimes in the 10s-of-ps to ns time region. The B ( E 2 ; 15 2 1 − → 11 2 1 − ) value is typical of a vibrational transition, despite 135Te possessing only one valence neutron and two valence protons. Shell model calculations performed with the jj 56 pnb state-of-the-art effective interaction predict a B(E2) value close to the experimental one and show that contributions from the π(g7/2, d5/2) f7/2 couplings are coherent.