抄録
We study the collective response function for typical isoscalar modes on the basis of the selfconsistent transport theory. For the quadrupole vibration we find the usual low energy and giant resonance peaks at low temperature whereas all strength is concentrated in a low energy mode above a transition temperature of around 1.5 MeV. On the other hand, the peak of the resonance for the monopole vibration does not move to lower frequency for the increasing temperature. Only the peak becomes somewhat broader.
