Excitation-energy dependence of the giant dipole resonance width

Autor: Volker Metag, G. Enders, Giovanni Casini, W. Kühn, K. Hagel, R.S. Simon, O. Schwalb, J. P. Wessels, W. Henning, F. D. Berg, K. D. Hildenbrand, A. Gobbi, Alessandro Olmi, R. Freifelder, R.S. Mayer, R. W. Novotny, R. Holzmann, Andrea Stefanini, M. Pfeiffer, R. J. Charity
Rok vydání: 1992
Předmět:
Zdroj: Physical review letters. 69(2)
ISSN: 1079-7114
Popis: High-energy \ensuremath{\gamma} rays have been measured in coincidence with heavy fragents in deeply inelastic reactions of $^{136}\mathrm{Xe}$${+}^{48}$Ti at 18.5 MeV/nucleon. The giant dipole resonance (GDR) strength function is deduced from an analysis of the photon spectra within the statistical model. The GDR width \ensuremath{\Gamma} is studied as a function of the fragment excitation energy ${\mathit{E}}^{\mathrm{*}}$. A saturation at about \ensuremath{\Gamma}=10 MeV is observed for ${\mathit{E}}^{\mathrm{*}}$/A\ensuremath{\ge}1.0 MeV/nucleon.
Databáze: OpenAIRE