First observation of two-proton radioactivity of $^{45}$Fe
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en
Communication dans un congrès
Ce document a été publié dans
Frontiers of Nuclear Structure, Frontiers of Nuclear Structure, 2002-07-29, Berkeley. 2003, vol. 656, p. 83-90
American Institute of Physics
Résumé en anglais
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 ...Lire la suite >
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.< Réduire
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