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Unique decay process: β-delayed emission of a proton and a neutron by the 11Li halo nucleus

par Baye, Daniel Jean ;Descouvemont, Pierre ;Tursunov, E. M.
Référence Physical review.C, 82, 5, page (054318)
Publication Publié, 2010

Article révisé par les pairs

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Résumé :

The neutron-rich Li11 halo nucleus is unique among nuclei with known separation energies in its ability to emit a proton and a neutron in a β-decay process. The branching ratio toward this rare decay mode is evaluated within a three-body model for the initial bound state and with Coulomb three-body final scattering states. The branching ratio should be comprised between two extreme cases, i.e., a lower bound 6×10-12 obtained with a pure Coulomb wave and an upper bound 5×1010-10 obtained with a plane wave. A simple model with modified Coulomb waves provides plausible values between 0.8×10-10 and 2.2×10 -10, with most probable total energies of the proton and neutron between 0.15 and 0.3 MeV. © 2010 The American Physical Society.