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First observation of two-proton radioactivity of $^{45}$Fe

Abstract : In experiments at the FRS of GSI and at the SISSI-LISE3 facility of GANIL, the decay of the proton drip-line nucleus 45Fe has been studied after projectile fragmentation of a 58Ni primary beam. Fragment-implantation events have been correlated with radioactive decay events in silicon telescopes on an event-by-event basis. The decay-energy spectrum of45Fe implants shows a distinct peak consistent with a two-proton ground-state decay of 45Fe. None of the events in the peak were found to be in coincidence with γ radiation or with β particles which were searched for in the telescope-surrounding detectors. The decay energy for 45Fe agrees nicely with several theoretical predictions for two-proton emission. These predictions strongly support the observed decay to be a simultaneous two-proton ground-state decay.
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http://hal.in2p3.fr/in2p3-00020067
Contributor : Michel Lion <>
Submitted on : Thursday, September 4, 2003 - 3:06:10 PM
Last modification on : Monday, November 30, 2020 - 11:04:04 AM

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Bertram Blank, M. Pfutzner, J. Giovinazzo, E. Badura, C. Bingham, et al.. First observation of two-proton radioactivity of $^{45}$Fe. Conference on Frontiers of Nuclear Structure, Jul 2002, Berkeley, United States. pp.83-90, ⟨10.1063/1.1556627⟩. ⟨in2p3-00020067⟩

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