Gamow Shell Model description of ${}^7$Li and elastic scattering reaction ${}^4$He(${}^3$H, ${}^3$H)${}^4$He

Spectrum of ${}^7$Li and elastic scattering reaction ${}^4$He(${}^3$H, ${}^3$H)${}^4$He are studied using the unified description of the Gamow shell model in the coupled-channel formulation (GSMCC). The reaction channels are constructed using the cluster expansion with the two mass partitions [${}^4$He + ${}^3$H], [${}^6$Li + n].