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Two-proton radioactivity: the case of $^{45}$Fe

Abstract : According to most mass models, several of the best candidates for two‐proton radioactivity lie in the A = 50 mass region, at the proton drip‐line. Recent experiments using the fragmentation of a 58Ni beam allowed us to reach this region and observe some of these candidates, like 45Fe and 48Ni. During an experiment at the GANIL / LISE3 facility helded in 2000, we could identify 22 events of implantation of 45Fe nuclei. The energy distribution of the corresponding decay events shows a clear peak at (1.14 ± 0.04) MeV that could be assigned to the direct 2‐proton emission from the ground state. This energy is in very good agreement with several theoretical predictions, and no coincident β particle has been observed experimentally. A half‐life of (4.7−1.4+3.4) ms has been measured for the decay of 45Fe.
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http://hal.in2p3.fr/in2p3-00020135
Contributor : Michel Lion <>
Submitted on : Tuesday, December 9, 2003 - 12:52:38 PM
Last modification on : Monday, November 30, 2020 - 11:04:04 AM

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J. Giovinazzo, Bertram Blank, C. Borcea, B.A. Brown, M. Chartier, et al.. Two-proton radioactivity: the case of $^{45}$Fe. International Conference PROCON 2003 2, Feb 2003, Legnaro, Italy. pp.111-117, ⟨10.1063/1.1615164⟩. ⟨in2p3-00020135⟩

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