Abstract:Low-lying levels of the 129 La isotope have been investigated through the β + /EC decay of 129 Ce. The radioactive nuclei were produced in the 94 Mo+ 40 Ca reaction at a bombarding energy of 255 MeV and transported with a He-jet system. On-line mass separation was used to select the 129 Ce beta-decay. γ-γ-t, X-γ-t, e − -γ-t coincidence measurements as well as time multi-analysis were performed. Internal conversion electrons were recorded with a magnetic selector and multipolarities deduced. The level scheme of… Show more
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