Phys. Rev. C 72, 054315 (2005) [7 pages]Two-proton radioactivity studies with 45Fe and 48NiReceived 18 July 2005; published 22 November 2005 In an experiment at the SISSI/LISE3 facility of GANIL, we have studied the decay of the two proton-rich nuclei 45Fe and 48Ni. We identified 30 implantations of 45Fe and observed for the second time four implantation events of 48Ni. In 17 cases, 45Fe decays by two-proton emission with a decay energy of 1.154(16) MeV and a half-life of T1/2=1.6-0.3+0.5 ms. The observation of 48Ni and of its decay allows us to deduce a half-life of T1/2=2.1-0.7+2.1 ms. One out of four decay events is completely compatible with two-proton radioactivity and may therefore indicate that 48Ni has a two-proton radioactivity branch. We discuss all information now available on two-proton radioactivity for 45Fe and 48Ni and compare it to theoretical models. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.054315
DOI:
10.1103/PhysRevC.72.054315
PACS:
23.50.+z, 23.90.+w, 21.10.-k, 27.40.+z
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