The electric dipole response of even-even Dy154-164 isotopes

The excitation of pygmy dipole resonance (PDR) and giant dipole resonance (GDR) in even-even Dy154-164 isotopes is examined through quasiparticle random-phase approximation (QRPA) with the effective interactions that restore the broken translational and Galilean invariances. In each isotope, an electric response emerges by showing ample distribution at energies below and above 10 MeV. We, therefore, study the transition cross-sections and probabilities, photon strength functions, transition strengths, isospin character, and collectivity of the predicted E1 responses.