Thermal and rotational effect on giant dipole resonances in rotating nuclei at high temperature

Microscopic calculations are carried out for the giant dipole resonances excited on the thermal high spin states in 162Er and 166Er based on the thermal linear response theory with realistic forces and large single-particle space. The dynamical strength function is compared with the experimental γ-ray absorption cross section. The general trend that the resonance energy decreases and the resonance width increases with increasing angular momentum and temperature is well reproduced by the calculations. (author)