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Transition from direct to sequential two-proton decay in s–d shell nuclei

T. A. Golubkova ; X. D. Xu ; L. V. Grigorenko ; I. G. Mukha ; C. Scheidenberger ; Mikhail V. Zhukov (Institutionen för fysik (Chalmers))
Physics Letters B (0370-2693). Vol. 762 (2016), p. 263-270.
[Artikel, refereegranskad vetenskaplig]

The transition between different mechanisms of two-proton decay in exotic nuclei and the governing physical conditions are generally studied. To perform this large-scale survey, the direct-decay model, which is widely used, was improved by generalizing the semi-analytical approaches used before. The improved model provides a flawless phenomenological description of three-body correlations in 2p decays, as is demonstrated by several examples of decays of low-lying states in 16Ne. Different transition mechanisms are shown to occur beyond the proton dripline for s–d shell nuclei. It is found that the transition dynamics of 2p-emitters allows the extraction of the width of the ground-state resonance of the core+p subsystem. The practical application of the method is illustrated by determining properties of the 14F ground state derived from the Ne15?O13+2p decay data, and of the 29Cl ground state derived from the Ar30?S28+2p decay data.

Nyckelord: Dripline s–d shell nuclei; One-proton, two-proton decay; Transitions between different modes of two-proton emission; Two-proton decays of 15Ne and 30Ar; Two-proton emission mechanisms

Denna post skapades 2016-12-19. Senast ändrad 2017-03-31.
CPL Pubid: 246206


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