Deformation of Heated Nuclei Observed in the Statistical Decay of the Giant Dipole Resonance

Abstract
Splitting of the giant dipole resonance built on excited states of Er nuclei, observed in continuum γ-ray spectra from C12 + Sm148 and C12 + Sm154 reactions, reveals the persistence of prolate, ground-state-like deformation at elevated temperature T1 MeV and spins I=0 to 25.