2023/04/21 by V. O. Nesterenko, M. A. Mardyban, Nesterenko, V. O. +7
Physics and Astronomy · #Atomic and Molecular Physics #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Nuclear physics research studies #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2304.10873
openalex publication_date 2023/04/21 · openalex created_date 2023/04/25 · openalex updated_date 2026/07/28
The dependence of the moment of inertia \cal J on the pairing and axial quadrupole deformation β in 24Mg and 20Ne was investigated. The study is based on quadrupole-constrained calculations with three cranking approaches for \cal J (Inglis-Belyaev, Thouless-Valatin, adiabatic time-dependent Hartree-Fock) and a representative set of Skyrme forces (SVbas, SkM*, SLy6). At variance with macroscopic collective models, the calculations predict the specific regime d\cal J/dβ<0 at β≥ 0.5 (24Mg) and β≥ 0.6 (20Ne), where the pairing breaks down. This regime is explained by two effects: full break up of the pairing and specific evolution of a \it single dominant particle-hole (1ph) configuration with β. The analysis of experimental data for the ground-state rotational bands in 24Mg and 20Ne shows that such regime is possible at low spins.