Recent Progress in Two-proton Radioactivity

TL;DR

This review summarizes recent experimental and theoretical advances in understanding two-proton radioactivity, highlighting technical innovations and models that elucidate the decay mechanisms and nuclear structures of proton-rich isotopes.

Contribution

It provides a comprehensive overview of recent progress in 2p decay research, including experimental techniques and theoretical models that connect nuclear structure with decay properties.

Findings

Advances in measuring nucleon-nucleon correlations.

Development of models linking structure and decay.

Enhanced understanding of exotic decay mechanisms.

Abstract

During the last few decades, rare isotope beam facilities have provided unique data for studying the properties of nuclides located far from the beta-stability line. Such nuclei are often accompanied by exotic structures and radioactive modes, which represent the forefront of nuclear research. Among them, two-proton (2p) radioactivity is a rare decay mode found in a few highly proton-rich isotopes. The 2p decay lifetimes and properties of emitted protons hold invaluable information regarding the nuclear structures in the presence of a low-lying proton continuum; as such, they have attracted considerable research attention. In this review, we present some of the recent experimental and theoretical progress regarding the 2p decay, including technical innovations for measuring nucleon--nucleon correlations and developments in the models that connect their structural aspects with their decay properties. This impressive progress should play a significant role in elucidating the mechanism of these exotic decays, probing the corresponding components inside nuclei, and providing deep insights into the open quantum nature of dripline systems.