Extended Random-Phase Approximation with modern NN+NNN interactions

An ab initio investigation of bulk and spectroscopic properties of finite closed (sub)shell nuclei has been performed within the so-called renor-malized random-phase approximation (RRPA). Such an approach accounts ex­plicitly for the ground-state correlations and removes thereby instabilities and inconsistencies induced by the quasiboson approximation (QBA) underlying RPA, especially pronounced by modern realistic potentials. An overall sat­isfactory agreement with the experimental data is achieved for all scrutinized observables.