GIOVINAZZO, J.; BLANK, Bertram; CHARTIER, M.; CZAJKOWSKI, S.; FLEURY, Agnès; LOPEZ JIMENEZ, M.J.; PRAVIKOFF, M.S.; THOMAS, J.C.; DE OLIVEIRA SANTOS, Francois; LEWITOWICZ, M.; MASLOV, V.; STANOIU, M.; GRZYWACZ, R.; PFUTZNER, M.; BORCEA, C.; BROWN, B.A.

doi:10.1103/PhysRevLett.89.102501

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GIOVINAZZO, J.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

BLANK, Bertram
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

CHARTIER, M.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Physical Review Letters. 2002, vol. 89, p. 102501

American Physical Society

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In an experiment at the SISSI-LISE3 facility of GANIL, the decay of the proton drip-line nucleus Fe45 has been studied after projectile fragmentation of a Ni58 primary beam at 75 MeV/nucleon impinging on a natural nickel target. Fragment-implantation events have been correlated with radioactive decay events in a 16x16 pixel silicon strip detector on an event-by-event basis. The decay-energy spectrum of Fe45 implants shows a distinct peak at (1.06+/-0.04)MeV with a half-life of T1/2 = (4.7+3.4-1.4)ms. None of the events in this peak is in coincidence with beta particles which were searched for in a detector next to the implantation detector. For a longer correlation interval, daughter decays of the two-proton daughter Cr43 can be observed after Fe45 implantation. The decay energy for Fe45 agrees nicely with several theoretical predictions for two-proton emission. Barrier-penetration calculations slightly favour a di-proton emission picture over an emission of two individual protons and point thus to a He2 emission mode.< Réduire

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Two-proton radioactivity of $^{45}$Fe

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