Cluster Structure in Be Isotopes within Point-Coupling Covariant Density Functional

The potential energy surfaces and density distributions of ground states in even-mass Be isotopes are studied by using the point-coupling covariant density functional theory with the PC-F1 effective interaction. The clustering structure is exhibited automatically in most of the Be isotopes. The results indicate that ⁶Be has an α+2p clustering structure, while ^8,10,14Be have the 2α clustering structure. The α–α distances and the corresponding quadrupole deformation parameters have a similar evolution trend against the neutron number.