Mechanism Of Antimagnetic Rotation In Even-even Nuclei ^100,102,104Pd

People proposed the concept of nuclear magnetic rotation in 1994, then they con-firm it in experient. Now they have been a hot research. We know that there is fer-romagnetic in metal, also there is a corresponding antiferromagnetic, analogy to this phenomenon, the concept of antimagnetic rotation came into being.Magnetic rotation and antimagnetic rotation have occurred in nearly spherical nuclei, the angular mo-mentum of magnetic rotation is obtained by proton and neutron closing scissors im-plemented, So people call it scissors mechanism, The antimagnetic rotating is similar to two scissors closing, so people call it double scissors mechanism. It is important to study the research on nuclear magnetic rotation and magnetic anti-rotation mecha-nism. It is not only to help us better understand the movement patterns of the nucleus inside, but also we can improve the understanding of symmetry of the atomic nucleus and spontaneous symmetry breaking.In this work, we used the tilted axis cranking model based on covariant density functional theory to investigate the high spin states in 104,100,102Pd. The relationship-s between spin, energy spectra, deformation parameters, and reduced E2 transition probabilities and rotational frequency are calculated. The calculated results are in good agreement with the available data. The microscopic investigations of the angular momentum indicate that 104,100,102Pd present double scissors mechanism. Based on the contribution of collective rotation and antimagnetic rotation to the total angular mo-mentum, the proportion of antimagnetic rotation is 86%,68%,54%, respectively. With the increasing of neutron number, the proportion of antimagnetic rotation decreases Finally, we discussed the flow of these three nuclei chance,and found the flow almost formed by N=4,6,8 neutrons and four protons of the shell 50 outer. Finally, the cur-rents in 104,100,102pd are presented and discussed in detail. It is found that they are essentially determined by the valence particles and/or holes.