Abstract
The particle-number-conserving method based on the cranked shell model is used to investigate the antimagnetic rotation band in 104Pd. The experimental moments of inertia and reduced B(E2) transition probabilities are reproduced well. The J(2)/B(E2) ratios are also discussed. The occupation probability of each orbital close to the Fermi surface and the contribution of each major shell to the total angular momentum alignment as function of rotational frequency are analyzed. The backbending mechanism of the ground state band in 104Pd is understood clearly and the configuration of the antimagnetic rotation after backbending is clarified. In addition, the crossing of a four quasiparticle state with this antimagnetic rotation band is also predicted. By examining the closing of the angular momenta of four proton holes towards the neutron angular momentum, the " two-shears-like” mechanism for this antimagnetic rotation is investigated and two stages of antimagnetic rotation in 104Pd are clearly seen.
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