Tensor effects in shell evolution using non-relativistic and relativistic mean field

Tensor effects in shell evolution are studied within the mean-field approach. Particular attention is paid to the analysis of the proton magic gap Z = 8. Hartree-Fock calculations with Skyrme and Gogny interactions are performed where the tensor term has a zero and finite range, respectively. Results obtained with and without the tensor component are compared between them and with the experimental data. To complete this analysis, the tensor effect is also investigated within the relativistic Hartree-Fock model. It turns out that the tensor effect can be easily identified in the evolution of the proton magic gap Z = 8. We suggest to explicitly include the data associated to this gap evolution as new constraints in the fitting procedures when the tensor contribution is taken into account at the mean-field level.