High-K multi-particle bands and pairing reduction in 254No * * Supported by the National Natural Science Foundation of China (11775112, 11535004, 11875027, 11761161001) and the Priority Academic Program Development of Jiangsu Higher Education Institutions

Abstract

The multi-particle states and rotational properties of the two-particle bands in are investigated by the cranked shell model with pairing correlations treated by the particle number conserving method. The rotational bands on top of the two-particle and states and the pairing reduction are studied theoretically in for the first time. The experimental excitation energies and moments of inertia of the multi-particle states are reproduced well by the calculations. Better agreement with the data is achieved by including the high-order deformation , which leads to enlarged and deformed shell gaps. An increase of in these two-particle bands compared with the ground state band is attributed to the pairing reduction due to the Pauli blocking effect.