Lightest and heaviest two-neutron halo nuclei, 6He and 22C.

The microscopic cluster model approach has been performed to study the nuclear structure of the lightest and heaviest two-neutron halo nuclei, 6He and 22C, respectively. The matter radius and binding energy for the 6He and 22C nuclei are calculated and the effect of the core deformation (20C) on the properties of 22C nuclei is also discussed. Calculations have shown that the microscopic cluster model provides a good description of binding energy as well as matter radius in comparison to experimental data. The fittings of some parameters such as central potential depth (Vo), empirical constant (ro), and surface diffuseness value (a) are discussed to find agreement in the results with the available experimental data. The exotic properties of two-neutron halo nuclides 6He and 22C such as weak binding energy, abnormal large matter radius, and Borromean system have been confirmed in the present work. [ABSTRACT FROM AUTHOR]