Nuclear charge-exchange excitations based on a relativistic density-dependent point-coupling model

Spin-isospin transitions in nuclei away from the valley of stability are essential for description astrophysically relevant weak interaction processes. While they remain mainly beyond reach experiment, theoretical modeling provides important insight into their properties. In order to describe spin-isospin response,vcthe proton-neutron relativistic quasiparticle random phase approximation (PN-RQRPA) is formulated using density-dependent point coupling interaction, and separable pairing both $T=1$ $T=0$ channels. By implementing recently established DD-PCX with improved isovector properties neutron-to-proton number asymmetry, isobaric analog resonances (IAR) Gamow-Teller (GTR) have been investigated. contrast other models that usually underestimate IAR excitation energies Sn isotope chain, present model accurately reproduces experimental data, while GTR depend on isoscalar strength. This framework not only an response nuclei, but it also allows future large scale calculations charge-exchange excitations processes stellar environment.