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Dombradi","submitted_at":"2012-06-28T06:22:05Z","abstract_excerpt":"The 0$^+_2$ state in $^{34}$Si has been populated at the {\\sc Ganil/Lise3} facility through the $\\beta$-decay of a newly discovered 1$^+$ isomer in $^{34}$Al of 26(1) ms half-life. The simultaneous detection of $e^+e^-$ pairs allowed the determination of the excitation energy E(0$^+_2$)=2719(3) keV and the half-life T$_{1/2}$=19.4(7) ns, from which an electric monopole strength of $\\rho^2$(E0)=13.0(0.9)$\\times10^{-3}$ was deduced. 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