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Relativistic mean field study of neutron rich even-even C and Be isotopes

Ground state properties of neutron rich even-even Be and C nuclei have been investigated using Relativistic Mean Field approach in co-ordinate space. The positions of the neutron drip line are correctly predicted for both the elements. The nucleus $^{14}$Be shows a two neutron halo but, contrary to expectation, $^{22}$C does not exhibit any halo structure. In carbon nuclei, N=16 comes out as a new magic number. The single particle level ordering observed in stable nuclei is found to be modified in neutron rich Be isotopes. Elastic partial scattering cross sections for proton scattering in inverse kinematics have been calculated using the theoretically obtained densities for some of the nuclei and compared with available experimental data. The total cross cross sections for elastic scattering have also been calculated for all the nuclei studied showing a large increase for the halo nucleus $^{14}$Be. The nuclei have also been investigated for deformation. The nuclei $^{10}$Be and $^{16,18,20}$C are observed to be deformed in their ground state.