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 emission mechanisms
two-proton decay
One-proton
Dripline s–d shell nuclei
Two-proton decays of 15Ne and 30Ar
Författare
T. A. Golubkova
Moscow State University
X. D. Xu
Beihang University
Helmholtz-Gemeinschaft Deutscher Forschungszentren
Justus-Liebig-Universität Gießen
L. V. Grigorenko
Joint Institute for Nuclear Research (JINR)
National Research Nuclear University
National Research Centre "Kurchatov Institute"
I. G. Mukha
Helmholtz-Gemeinschaft Deutscher Forschungszentren
National Research Centre "Kurchatov Institute"
C. Scheidenberger
Helmholtz-Gemeinschaft Deutscher Forschungszentren
Justus-Liebig-Universität Gießen
Mikhail Zhukov
Chalmers, Fysik
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 762 263-270Ämneskategorier (SSIF 2011)
Subatomär fysik
DOI
10.1016/j.physletb.2016.09.034