Two-Proton Radioactivity with 2p halo in light mass nuclei A$=$18$-$34

Abstract

Two-proton radioactivity with 2p halo is reported theoretically in light mass nuclei A $=$ 18-34. We predict ${}^{19}$Mg, ${}^{22}$Si, ${}^{26}$S, ${}^{30}$Ar and ${}^{34}$Ca as promising candidates of ground state 2p-radioactivity with S${}_{2p}$ $<$ 0 and S${}_p$ $>$ 0. Observation of extended tail of spatial charge density distribution, larger charge radius and study of proton single particle states, Fermi energy and the wave functions indicate 2p halo like structure which supports direct 2p emission. The Coulomb and centrifugal barriers in experimentally identified 2p unbound ${}^{22}$Si show a quasi-bound state that ensures enough life time for such experimental probes. Our predictions are in good accord with experimental and other theoretical data available so far.

5 Pages, 5 figures

References in corpus (8)

• Two-proton radioactivity
• A proton density bubble in the doubly magic ${}^{34}$Si nucleus
• Proton and neutron skins of light nuclei within the Relativistic Mean Field theory
• Different mechanism of two-proton emission from proton-rich nuclei ${}^{23}$Al and ${}^{22}$Mg
• Proton radioactivity described by covariant density functional theory with Similarity Renormalization Group method
• \b{eta}-delayed three-proton decay of 31Ar
• Beta-decay study of $T_z=-2$ proton-rich nucleus ${}^{20}$Mg
• Sizeable beta-strength in 31Ar(beta-3p) decay

Cited by in corpus (2)

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• Structural Properties and $\alpha$-Decay Chains of Transfermium Nuclei (101$\le$Z$\le$110)