LAUSR

The finite-amplitude method is used in solving the local quasiparticle random-phase approximation to calculate the collective inertia along a fission path obtained by the constrained Hartree-Fock-Bogoliubov method with a Skyrme energy-density functional. The collective inertia obtained for the symmetric fission of ${}^{240}$Pu and ${}^{256}$Fm is considerably larger than that obtained in the cranking approximation. Including such dynamical residual effects leads to an orders of magnitude difference in the half-lives compared to those calculated using the WKB approximation.