Transition from direct to sequential two-proton decay in s–d shell nuclei
Artikel i vetenskaplig tidskrift, 2016

The transition between different mechanisms of two-proton decay in exotic nuclei and the governing physical conditions are generally studied. To perform this large-scale survey, the direct-decay model, which is widely used, was improved by generalizing the semi-analytical approaches used before. The improved model provides a flawless phenomenological description of three-body correlations in 2p decays, as is demonstrated by several examples of decays of low-lying states in 16Ne. Different transition mechanisms are shown to occur beyond the proton dripline for s–d shell nuclei. It is found that the transition dynamics of 2p-emitters allows the extraction of the width of the ground-state resonance of the core+p subsystem. The practical application of the method is illustrated by determining properties of the 14F ground state derived from the Ne15?O13+2p decay data, and of the 29Cl ground state derived from the Ar30?S28+2p decay data.

Transitions between different modes of two-proton emission

two-proton decay

Two-proton emission mechanisms

Two-proton decays of 15Ne and 30Ar

Dripline s–d shell nuclei

One-proton

Författare

T. A. Golubkova

Lomonosov Moscow State University

X. D. Xu

GSI Helmholtzzentrum für Schwerionenforschung

Justus Liebig University Giessen

Beihang University

L. V. Grigorenko

Joint Institute for Nuclear Research

National Research Centre "Kurchatov Institute"

National Research Nuclear University

I. G. Mukha

GSI Helmholtzzentrum für Schwerionenforschung

National Research Centre "Kurchatov Institute"

C. Scheidenberger

GSI Helmholtzzentrum für Schwerionenforschung

Justus Liebig University Giessen

Mikhail Zhukov

Chalmers, Fysik

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

0370-2693 (ISSN)

Vol. 762 263-270

Ämneskategorier

Subatomär fysik

DOI

10.1016/j.physletb.2016.09.034