Matter density distribution and longitudinal form factors for the ground and excited states of 17ne exotic nucleus

Abstract EN

The two-frequency shell model approach is used to calculate the ground state matter density distribution and the corresponding root mean square radii of the two-proton17Ne halo nucleus with the assumption that the model space of 15O core nucleus differ from the model space of extra two loosely bound valence protons.

Two different size parameters bcore and bhalo of the single particle wave functions of the harmonic oscillator potential are used.

The calculations are carried out for different configurations of the outer halo protons in 17Ne nucleus and the structure of this halo nucleus shows that the dominant configuration when the two halo protons in the 1d5/2 orbit (15O core plus two protons halo in pure 1d5/2 orbit).

The calculated matter density distribution in terms of the two-frequency shell model is compared with the calculated one in terms one size parameter for all orbits to illustrate the effect of introducing one or two size parameters in calculations.

The longitudinal form factors for elastic C0 and inelastic C2 electron scattering from 17Ne nucleus are calculated for the considered configurations and for three states of each configuration which are the ground state (J T = 1/2-3/2) and the first two excited states (J T= 3/2-3/2) and (J T=5/2-3/2).

The electric transition strengths B(C2) are calculated for the excited states and for the effective nucleon charges which are used in this work and compared with the experimental values.