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arXiv · 1605.01013

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

T. A. Golubkova·X. Xu·L. V. Grigorenko·I. G. Mukha·C. Scheidenberger·M. V. Zhukov
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Abstract

Transitions among different mechanisms of two-proton decay are studied in general. The introduced improved direct-decay model generalizes the semi-analytical models used before and provides flawless phenomenological description of three-body correlations in $2p$ decays. This is demonstrated by examples of the low-lying $^{16}$Ne state decays. Different forms of transition dynamic are shown to be highly probable beyond the proton dripline for the $s$-$d$ shell nuclei. It is demonstrated that transition dynamic of $2p$ emitters can provide means for extraction of a width of the ground-state resonance of a core+$p$ subsystem of the core+$2p$ system. Practical applicability of the method is demonstrated by properties of the $^{14}$F ground state derived from the $^{15}\mbox{Ne}\rightarrow ^{\,13\!\!}\mbox{O}+2p$ decay data and of the $^{29}$Cl ground state derived from the $^{30}\mbox{Ar}\rightarrow ^{\,28\!\!}\mbox{S}+2p$ decay data.

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T. A. Golubkova, X. Xu, L. V. Grigorenko, I. G. Mukha, C. Scheidenberger, M. V. Zhukov. 2016-05-09. Transition from direct to sequential two-proton decay in $s$-$d$ shell nuclei. https://doi.org/10.1016/j.physletb.2016.09.034

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