Theoretical calculations of γ-ray feeding patterns for Gd, Dy and Er nuclei

摘要: Abstract The side-feeding patterns and the spectra of unresolved γ-lines are calculated for Gd, Dy Er nuclei with neutron numbers from 82 to 86. Energies configurations states yrast line approximately 2 MeV higher in energy as many-quasiparticle a deformed oblate potential. γ-cascade is simulated by Monte Carlo calculation. With common average entry angular momentum 35 h non-collective considered, observed variation intensity strongest γ-line spin well reproduced. stretched dipole part continuum also reproduced, whereas quadrupole cannot be accounted for. These findings accordance two-stage picture γ-decay. First comes cascade transitions, probably collective nature. This feeds into numerous weakly around ≈ , decay proceeds first weak mainly dipoles, later strong γ-lines.