Transition from direct to sequential two-proton decay in s–d shell nuclei
Journal article, 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.
One-proton
two-proton decay
Transitions between different modes of two-proton emission
Two-proton decays of 15Ne and 30Ar
Dripline s–d shell nuclei
Two-proton emission mechanisms
Author
T. A. Golubkova
Lomonosov Moscow State University
X. D. Xu
GSI Helmholtz Centre for Heavy Ion Research GmbH
Justus Liebig University Giessen
Beihang University
L. V. Grigorenko
National Research Centre "Kurchatov Institute"
National Research Nuclear University MEPhI
Joint Institute for Nuclear Research, Dubna
I. G. Mukha
GSI Helmholtz Centre for Heavy Ion Research GmbH
National Research Centre "Kurchatov Institute"
C. Scheidenberger
Justus Liebig University Giessen
GSI Helmholtz Centre for Heavy Ion Research GmbH
Mikhail Zhukov
Chalmers, Physics
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 762 263-270Subject Categories (SSIF 2011)
Subatomic Physics
DOI
10.1016/j.physletb.2016.09.034