Phys. Rev. Lett. 89, 102501 (2002) [4 pages]Two-Proton Radioactivity of 45FeReceived 21 May 2002; published 19 August 2002 In an experiment at the SISSI-LISE3 facility of GANIL, the decay of the proton drip line nucleus 45Fe has been studied. Fragment-implantation events have been correlated with radioactive decay events in a 16×16 pixel silicon-strip detector. The decay-energy spectrum of 45Fe implants shows a distinct peak at (1.14±0.04) MeV with a half-life of T1/2=(4.7-1.4+3.4) ms. None of the events in this peak is in coincidence with β particles. For a longer correlation interval, daughter decays of the two-proton daughter 43Cr can be observed after 45Fe implantation. The decay energy for 45Fe agrees nicely with several theoretical predictions for two-proton radioactivity. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.102501
DOI:
10.1103/PhysRevLett.89.102501
PACS:
23.50.+z, 27.40.+z
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