On the Collisional Damping of Giant Dipole Resonance
Abstract
Collisional damping widths of giant dipole excitations are calculated in Thomas-Fermi approximation by employing the microscopic in-medium cross-sections of Li and Machleidt and the phenomenological Gogny force. The results obtained in both calculations compare well, but account for about 25-35% of the observed widths in 120Sn and 208Pb at finite temperatures.
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