Beta-decay of 71Co and 73Co
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A decay spectroscopy study of the neutron-rich cobalt isotopes has been performed using fragmentation of a 86Kr36+ beam and the new LISE2000 spectrometer at GANIL. For 71Co and 73Co, the β-delayed γ radiation has been observed for the first time, and the half-lives were found to be 79(5) ms and 41(4) ms, respectively. Features of the decay are discussed qualitatively in terms of nuclear models.
PACS.25.70.Mn Projectile and target fragmentation 21.10.Tg Lifetimes 23.20.Lv γ transitions and level energies 27.50.+e 59 ⩽ A ⩽ 89
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