Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 56: Postersitzung

HK 56.15: Poster

Mittwoch, 18. März 1998, 17:00–19:00, Foyer

Damping of giant dipole resonances in symmetric and asymmetric nuclear matter — •U. Fuhrmann, K. Morawetz, R. Walke, and G. Röpke — AG Quantentheorie und Vielteilchensysteme, FB Physik, Universität Rostock, Universitätsplatz 3, D-18051 Rostock

The damping rates of hot giant resonances are investigated. The Giant dipole resonance (GDR) in symmetric and asymmetric nuclear matter [1] is described using the dielectric function (DF) in random phase approximation (RPA). We derive a dispersion relation whose complex solution provides us with the centroid energy and the damping width of giant resonances. With an extended appproach using a conserving relaxation time approximaion to include collision effects, different contributions to the damping of GDR will be discussed and compared with recent experimental data.

[1] U. Fuhrmann, K. Morawetz, R. Walke, Phys. Rev. C (1997), sub. .