Скачать или смотреть On the tracks of two-proton radioactivity, by Jérôme GIOVINAZZO (CENBG Bordeaux).

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The two-proton radioactivity is a very exotic decay mode that can occur for very neutron deficient nuclei located beyond proton drip-line. From theoretical assumptions, it was already predicted in the early 1960’, together with the one-proton radioactivity. Nevertheless, it is only in the years 2000 that a first experimental indication of the phenomenon could be observed, thanks to the development of the facilities that can produce nuclei far from stability.
This process is made possible thanks to very specific quantum effects at the microscopic level: the Coulomb barrier originating in the electric charge of all protons in the nucleus and the gain of stability caused by the coupling of nucleons in pairs. It has been observed in the decay of only 4 nuclei, and 20 years after the first observation, in order to understand this radioactivity, new experimental tools are built to measure the correlations of the protons, and theoretical models are developed to describe both the structure of the emitting nuclei and the dynamics of the emission.
In this presentation will give a brief description of this exotic decay process and explain the major steps of its study, from both theoretical and experimental sides.

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