Super-Heavy Elements (Z = 100-109) Treated as Calcium Clusters: First Ionization Energies

In the present work, it is shown that the first ionization energies for super-heavy elements (Z= 100-109) can be calculated by a semi-empirical method, if the super-heavy elements are treated (modelled) as calcium clusters. The values calculated in the present work are in good agreement compared with those from literature (modelling the super-heavy elements themselves, based on relativistic quantum mechanics).