High-K multi-particle bands and pairing reduction in ²⁵⁴No

2019/08/26 by Xiao-Tao He, Shu-Yong Zhao, He, Xiao-Tao +5
Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #nucl-ex #nucl-th

paper · pdf · doi:10.48550/arxiv.1908.09525

arxiv created 2019/08/26 · arxiv updated 2020/03/19

Abstract

The multi-particle states and rotational properties of two-particle bands in ²⁵⁴No are investigated by the cranked shell model (CSM) with pairing correlations treated by a particle-number conserving (PNC) method. For the first time, the rotational bands on top of two-particle K^π=3⁺,8^- and 10⁺ states and the pairing reduction are studied theoretically in ²⁵⁴No. The experimental excitation energies and moments of inertia for the multi-particle state are reproduced well by the calculation. Better agreement with the data are achieved by including the high-order deformation ε₆ which leads to enlarged Z=100 and N=152 deformed shell gaps. The rise of the J⁽¹⁾ in these two-particle bands compared with the ground-state band is attributed to the pairing reduction due to the Pauli blocking effects.

Related

• First complete description of low-lying spectroscopy in ²⁵⁴No
• Study of 0⁺ and 8^- states in even-even ^250-260No isotopes
• Rotational properties of the superheavy nucleus 256Rf and its neighboring even-even nuclei in particle-number conserving cranked shell model
• Influences of Z=100 and N=152 deformed shells on K^π=8^- isomers and rotational bands in N = 150 isotones
• Low-energy spectra of nobelium isotopes: Skyrme random-phase-approximation analysis