Studies on different pairing parameters in rare-earth nuclei

In the framework of relativistic mean field (RMF)theory, we use BCS approximation to calculate Ce, Gd and Yb isotopic chains with different pairing parameters. And found whether they can show shell structure are different, but other physical quantities are similar by using different kinds of pairing parameters, both can correctly reproduce the experimental binding energies, two-neutron separation energy and potential curves. (authors)