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