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 (12)

• Two-proton radioactivity of exotic nuclei beyond proton drip-line
• Examination of the evidence for a proton halo in ${}^{22}$Al
• Cluster radioactivity in trans-lead region: A systematic study with modified empirical formulas
• Study of Decay Modes in Transfermium Isotopes
• Structural properties and decay modes of Z $=$ 122, 120 and 118 superheavy nuclei
• Structural Properties and $\alpha$-Decay Chains of Transfermium Nuclei (101$\le$Z$\le$110)
• Deformation dependence of 2p-radioactivity half-lives: Probe with a new formula across the mass region with Z<82
• Impact of Nuclear Deformation of Parent and Daughter Nuclei on One Proton Radioactivity Lifetimes
• Collapse of N$=$28 magicity in exotic ${}^{40}$Mg -- Probe of deformed halo and 2n-radioactivity at Mg neutron drip-line
• Novel feature of doubly bubble nuclei in 50$\le$Z(N)$\le$82 region along with magicity and weakly bound structure
• Decay properties of undetected superheavy nuclei with Z>110
• Correlation between the nuclear structure and reaction dynamics of Ar-isotopes as projectile using the relativistic mean-field approach