Numerical simulation of the electromagnetic decay of the nuclei 152,154,156Dy with self-consistent collective strength functions

The electromagnetic decay of the nuclei 152,154,156Dy is analyzed using microscopic Hartree-Fock calculations at finite temperature. The theoretical collective transition probabilities are implemented in numerical simulations to produce theoretical spectra. Thermal shape fluctuations are also taken into account. The inclusion of these correlation is crucial in order to understand the main features of the collective E2 spectra of these isotopes at different energies. The theoretical calculations suggest a shape change as responsible for the unusual features of the spectrum of the nucleus 154Dy at high energy