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Narrow states in the three-proton emitter Na17

par Timofeyuk, Natalia ;Descouvemont, Pierre
Référence Physical review. C. Nuclear physics, 81, 5, 051301
Publication Publié, 2010-05

Article révisé par les pairs

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Résumé :

Based on a microscopic cluster model that reproduces well the C17 spectrum below the neutron threshold, we study the spectrum of its mirror nucleus Na17. We find that the Na17 ground state should be located at 2.4MeV above the Ne16(01+)+p threshold, being a broad 1/2+ resonance with a width of 1.4MeV. However, there should exist at least four narrow excited states in Na17; three of them, 3/21+, 7/21+, and 9/21+, decay into the Ne16(21+)+p channel, and the other, 5/21+, decays mainly into the Ne16(01+)+p channel. Because the daughter nucleus Ne16 is a two-proton emitter, the narrow Na17 states must undergo a sequential three-proton decay via intermediate states in Ne16. © 2010 The American Physical Society.