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

TL;DR

This paper theoretically predicts two-proton radioactivity with 2p halo structures in light nuclei (A=18-34), identifying promising candidates and analyzing their structural properties to support experimental detection.

Contribution

It introduces new theoretical predictions of 2p radioactivity with halo features in specific light nuclei, supported by structural analyses and consistency with existing data.

Findings

Identifies $^{19}$Mg, $^{22}$Si, $^{26}$S, $^{30}$Ar, and $^{34}$Ca as candidates for 2p radioactivity.

Demonstrates 2p halo structures through charge density and radius analyses.

Shows quasi-bound states in $^{22}$Si support experimental observability.

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.