| Autor: |
M. Pfeiffer, M. Notheisen, F. D. Berg, W. Kühn, K. D. Hildenbrand, R.S. Simon, K. Teh, O. Schwalb, J. P. Wessels, V. Metag, L.B. Venema, A. Gobbi, P. Paul, N. Herrmann, Herbert Löhner, T. Wienold, J. Ritman, J. Mösner, R. W. Novotny |
| Rok vydání: |
1993 |
| Předmět: |
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| Zdroj: |
Physical Review Letters. 70:2659-2659 |
| ISSN: |
0031-9007 |
| Popis: |
The photon decay of the relativistic Coulomb excitation of the single and double giant dipole resonance (GDR) in the target has been observed in the system 1A GeV $^{209}\mathrm{Bi}$ on $^{208}\mathrm{Pb}$. For peripheral events which are dominated by relativistic Coulomb excitation, a large Lorentzian structure in the photon energy spectrum is peaked at 13.3\ifmmode\pm\else\textpm\fi{}0.1 MeV with a width of 4.1\ifmmode\pm\else\textpm\fi{}0.1 MeV, corresponding to the single GDR in the $^{208}\mathrm{Pb}$ target. The sum energy of coincident \ensuremath{\gamma}-\ensuremath{\gamma} pairs shows a broad feature at 25.6\ifmmode\pm\else\textpm\fi{}0.9 MeV with a Lorentzian width of 5.8\ifmmode\pm\else\textpm\fi{}1.1 MeV, which we assign to the double GDR observed via the two-\ensuremath{\gamma} decay channel. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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