Octupole correlations in ^{220,222,224,226}Rn

2025/09/17 by Yi-Ming Jiang, Xiaoxia Lü, Jiang, Yi-Ming +3
Physics and Astronomy · #FOS: Physical sciences #Neutrino Physics Research #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2509.13613

openalex publication_date 2025/09/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The octupole correlations in ^{220,222,224,226}Rn are investigated by using multi-dimensionally constrained covariant density functional theory. The ground-state properties and potential energy surfaces are analyzed, revealing that octupole deformation appears in ^222,224Rn, but not in ^220,226Rn. The relationship between pairing correlations and octupole deformation is examined, showing that the neutron pairing energy decreases as octupole deformation develops, whereas the proton pairing energy shows the opposite behavior. The microscopic origin of octupole correlations in these radon isotopes are explored based on an examination of the single-particle levels near the Fermi surface and a schematic two-level model. Experiments have indicated that these isotopes undergo octupole vibrations and the present prediction of octupole deformation in ^222,224Rn awaits further confirmation.

Related

• Octupole deformation and Ra puzzle with covariant density functional theory in three-dimensional lattice space
• Microscopic description of quadrupole-octupole coupling in actinides with the Gogny-D1M energy density functional
• Octupole deformation and Ra puzzle in reflection asymmetric covariant density functional theory
• Exotic nonaxial-octupole shapes in N=184 isotones from covariant density functional theories
• Quadrupole-octupole coupling and the onset of octupole collectivity