Abstract:We investigate the collective response function and the energy-weighted sums
(EWS) $m_k$ for isovector mode in hot nuclei. The approach is based on the
collisional kinetic theory and takes into consideration the temperature and the
relaxation effects. We have evaluated the temperature dependence of the
adiabatic, $E_1=\sqrt{m_1/m_{-1}}$, and scaling, $E_3=\sqrt{m_3/m_1}$, energy
centroids of the isovector giant dipole resonances (IVGDR). The centroid energy
$E_3$ is significantly influenced by the Fermi surfac… Show more
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