2025/11/19 by Inakura, Tsunenori, Horiuchi, Wataru, Michimasa, Shin'ichiro +1
Physics and Astronomy · #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Quantum chaos and dynamical systems
paper · doi:10.48550/arxiv.2511.15040
openalex publication_date 2025/11/19 · openalex created_date 2025/11/23 · openalex updated_date 2026/07/28
We present a systematic survey of even-even nuclei with Z>50 to identify where a very large prolate configuration driven by the second intruder orbit emerges. Within the energy density functional theory framework, we find in representative cases a pronounced prolate minimum at quadrupole deformation β2≈ 0.3--0.4. A characteristic feature of these minima is a local enhancement of the hexadecapole (β4) component relative to nearby deformations, which is a clear fingerprint of the β2--β4 coupling expected for the second intruder orbit. Representative comparisons among three Skyrme interactions show a similar appearance of the highly deformed minimum and a local enhancement of β4 at the prolate minimum, indicating qualitative robustness with respect to the interaction. The resulting maps highlight specific heavy nuclei where highly deformed ground states are anticipated.