Calculating The Rotational Energy Levels for Ground State Bands of Dy , Gd and Er Even-Even Isotopes

The aim of this work is to calculate the rotational energy levels and energy of transition of 156-162 Dy, Gd and Er even-even Isotopes by using the Nuclear Softness Model (NS3) and approximated Model of the NS2 (our work). The calculated values for both models were obtained by MATLAB program and compared with the experimental data, it was a good agreement.