Two-proton radioactivity of 45Fe.
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 16x16 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 T(1/2)=(4.7(+3.4)(-1.4)) ms. None of the events in this peak is in coincidence with beta 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.
Giovinazzo
J
J
CEN Bordeaux-Gradignan, Le Haut-Vigneau, F-33175 Gradignan Cedex, France.
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Chartier
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Czajkowski
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Fleury
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Lopez Jimenez
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Pravikoff
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Thomas
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De Oliveira Santos
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Lewitowicz
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Maslov
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Stanoiu
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Grzywacz
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Pfützner
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Borcea
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Brown
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