Noniterative finite amplitude methods for E1 and M1 transitions and the application to neutron radiative capture cross sections

We derive the equation of quasiparticle random-phase approximation (QRPA) based on noniterative finite amplitude method and demonstrate how the fully microscopic density functional theory predicts the electric dipole (E1) and the magnetic dipole (M1) giant resonances. The obtained photoabsorption cross sections are applied to the calculation of neutron radiative capture cross sections based on the statistical Hauser-Feshbach theory. We find that the low energy M1 scissors mode in our QRPA calculation can significantly enhance the capture cross sections for deformed nuclei.