2024/10/26 by J.X. Zhang, Zhang, Jun, Hai-Qian Zhang +7
Chemistry · Physics and Astronomy · #Astro and Planetary Science #FOS: Physical sciences #Inorganic Fluorides and Related Compounds #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · pdf · doi:10.48550/arxiv.2410.20111
openalex publication_date 2024/10/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Kπ=8- isomeric states and rotational bands in the even-even N = 150 isotones with 94 \leqslant Z \leqslant 104 are investigated by the cranked shell model (CSM) with pairing correlations treated by the particle-number-conserving (PNC) method. The experimental bandhead energies and kinematic moments of inertia (MOIs) are reproduced quite well by the PNC-CSM calculation. The two-neutron state with configuration ν9/2-[734] ⊗ ν7/2+[624] is the lowest 8- state for these isomers. This is a demonstration of the deformed neutron shell at N=152. Low-lying two proton π28-(π9/2+[624] ⊗ π7/2-[514]) configuration state is predicted only for 252No and 254Rf due to the deformed proton shell at Z=100. A distinct upbending is observed for the ν28- bands in the lighter isotones while it is absent for bands in the heavier ones. The upbending of the ν28- band at frequency ℏω≈ 0.20 MeV in 244Pu attributes to the sudden proton alignment of the interference term jx(π5/2+[642]⊗π7/2+[633]). The irregularity of MOI observed in the Kπ=8- band of 252No can be explained by the mixing of the ν28-(ν9/2-[734] ⊗ ν7/2+[624]) and π28-(π9/2+[624] ⊗ π7/2-[514]) configurations. The 20%-30% increase of the bandhead J(1) for the 8- bands comparing to the ground-state band is attributed to the ∼ 5% pairing gap reduction of the two-neutron ν7/2+[624] ⊗ ν9/2-[734] configuration state comparing to the ground-state band.