Электронный каталог

Статья

Zhang, J.
Influences of Z=100 and N=152 Deformed Shells on K&sup(*p)=8*- Isomers and Rotational Bands in N=150 Isotones / J.Zhang, H.-Q.Zhang, T.M.Shneidman, R.V.Jolos, X.-T.He. – Text : electronic // Physical Review C. – 2025. – Vol. 111, No. 1. – P. 014319. – URL: https://doi.org/10.1103/PhysRevC.111.014319.

The K&sup(*p)=8*- isomeric states and rotational bands in the even-even 𝑁=150 isotones with 94 ⩽ 𝑍 ⩽ 104 are investigated by the cranked shell model (CSM) with pairing correlations treated by the particle-number-conserving (PNC) method. The experimental band-head energies and kinematic moments of inertia (MOIs) are reproduced quite well by the PNC-CSM calculation. The two-neutron state with configuration 𝜈⁢9/2*-⁢ [734] ⊗ 𝜈⁢7/2*+⁢[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 𝜋*2⁢8*-⁢(𝜋⁢9/2*+⁢ [624] ⊗ 𝜋⁢7/2*- ⁢[514]) configuration state is predicted only for *2*5*2No and &sup(254)Rf due to the deformed proton shell at 𝑍=100. A distinct upbending is observed for the 𝜈*2⁢8*- bands in the lighter isotones while it is absent for bands in the heavier ones. The upbending of the 𝜈*2⁢8*- band at frequency ℏ⁢𝜔≈0.20 MeV in *2*4*4Pu attributes to the sudden proton alignment of the interference term 𝑗&sub(𝑥)⁢(𝜋⁢5/2*+ ⁢[642] ⊗ 𝜋⁢7/2*+ ⁢[633]). The irregularity of MOI observed in the 𝐾&sup(𝜋)=8*- band of *2*5*2No can be explained by the crossing between the 𝜈*2⁢8*-⁢(𝜈⁢9/2*- ⁢[734] ⊗ 𝜈⁢7/2*+ ⁢[624]) and 𝜋*2⁢8*-⁢(𝜋⁢9/2*+⁢ [624] ⊗ 𝜋⁢7/2*- ⁢[514]) configurations. The 20%–30% increase of the band head 𝐽&sup((1)) for the 8*- bands comparing to the ground-state band is attributed to the ∼5% pairing gap reduction of the two-neutron 𝜈⁢7/2*+ ⁢[624] ⊗ 𝜈⁢9/2*-⁢[734] configuration state comparing to the ground-state band.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 341 а - Различные модели ядер$
Спец.(статьи,препринты) = С 341.2в - Уровни ядер
Бюллетени = 13/025