Elastic Electron Scattering form Factors for Odd-A 2s-1d Shell Nuclei

The charge density distributions (CDD) and the elastic electron scattering form factors F(q) of the ground state for some odd mass nuclei in the 2s -1d shell, such as 19 K، 25 Mg، 27 Al، 29Si، and 31 P have been calculated based on the use of occupation numbers of the states and the single particle wave functions of the harmonic oscillator potential with size parameters chosen to reproduce the observed root mean square charge radii for all considered nuclei. It is found that introducing additional parameters, namely; α ,α1 and , α2 which reflect the difference of the occupation numbers of the states from the prediction of the simple shell model leads to very good agreement between the calculated and experimental results of the charge density distributions throughout the whole range of r.The experimental electron scattering form factors for 19 K، 25 Mg، 27 Al، 29Si، and 31 P nuclei are in reasonable agreement with the present calculations throughout all values of momentum transfer q.