Gamow-Teller strength distributions in ${}^{76}\mathrm{Ge}$ and ${}^{76}\mathrm{Se}$ from deformed quasiparticle random-phase approximation

We study Gamow-Teller strength distributions of ${}^{76}\mathrm{Ge}$ and ${}^{76}\mathrm{Se}$ within a deformed quasiparticle random-phase approximation formalism, which includes residual spin-isospin forces in the particle-hole and particle-particle channels. We consider two different methods to construct the quasiparticle basis, a self-consistent approach based on a deformed Hartree-Fock calculation with density-dependent Skyrme forces and a more phenomenological approach based on a deformed Woods-Saxon potential. Both methods contain pairing correlations in the BCS approach. We discuss the sensitivity of Gamow-Teller strength distributions to the deformed mean field and residual interactions.