2014/08/31 by D. Hove, D. V. Fedorov, H. O. U. Fynbo +4
Physics and Astronomy · #Alpha decay #Alpha particle #Astronomical and nuclear sciences #Atomic physics #Cluster (spacecraft) #Excited state #Nuclear physics #Nuclear physics research studies #Nuclear structure #Nucleus #Physics #Quantum Chromodynamics and Particle Interactions #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.90.064311
published as Phys. Rev. C90, 064311, (2014) · 18 pages, 21 figures, published version
openalex publication_date 2014/12/12 · arxiv created 2014/12/15 · arxiv updated 2014/12/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Borromean nuclear cluster structures are expected at the corresponding drip lines. We locate the regions in the nuclear chart with the most promising constituents, it being protons and \ensuremathα particles and investigate in details the properties of the possible Borromean two-\ensuremathα systems in medium-heavy nuclei. We find in all cases that the \ensuremathα particles are located at the surface of the core nucleus as dictated by Coulomb and centrifugal barriers. The two lowest three-body bound states resemble a slightly contracted 8Be nucleus outside the core. The next two excited states have more complex structures but with strong components of linear configurations with the core in the middle. \ensuremathα-removal cross sections would be enhanced with specific signatures for these two different types of structures. The even-even Borromean two-\ensuremathα nucleus, 142Ba, is specifically investigated and predicted to have 134Te\text\ensuremath-\ensuremathα\text\ensuremath-\ensuremathα structure in its ground state and low-lying spectrum.