2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197625The branching ratios for E1 transitions between the spin-dipole (SD) and Gamow-Teller (GT) giant resonances in $^{90}$Nb and $^{208}$Pb are evaluated. Assuming the main GT-state has the wave function close to that for the "ideal" GT-state, we reduced the problem to calculate the SD and GT strength functions. These strength functions are evaluated within an extended continuum-RPA approach.8 pages, submitted to Phys. Rev. CNuclear Theorytext