Relativistic energy density functionals: Low-energy collective states of Pu-240 and Er-166

Abstract

The empirical relativistic energy density functional DD-PC1, adjusted exclusively to experimen- tal binding energies of a large set of deformed nuclei with A =150 - 180 and A = 230 - 250, is tested with spectroscopic data for 166Er and 240Pu. Starting from constrained self-consistent triaxial relativistic Hartree-Bogoliubov calculations of binding energy maps as functions of the quadrupole deformation in the (beta-gamma) plane, excitation spectra and E2 transition probabilities are calculated as solutions of the corresponding microscopic collective Hamiltonian in five dimensions for quadrupole vibrational and rotational degrees of freedom, and compared with available data on low-energy collective states.