1ST OBSERVATION OF THE COULOMB-EXCITED DOUBLE GIANT-DIPOLE RESONANCE IN PB-208 VIA DOUBLE-GAMMA DECAY

Autor: RITMAN, J, BERG, FD, KUHN, W, METAG, [No Value], NOVOTNY, R, NOTHEISEN, M, PAUL, P, PFEIFFER, M, SCHWALB, O, LOHNER, H, GOBBI, A, HERRMANN, N, HILDENBRAND, KD, MOSNER, J, SIMON, RS, TEH, K, WESSELS, JP, WIENOLD, T, Venema, Lars
Přispěvatelé: KVI - Center for Advanced Radiation Technology
Jazyk: angličtina
Rok vydání: 1993
Předmět:
Zdroj: Physical Review Letters, 70(5), 533-536. AMER PHYSICAL SOC
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 Bi-209 on Pb-208. For peripheral events which are dominated by relativistic Coulomb excitation, a large Lorentzian structure in the photon energy spectrum is peaked at 13.3+/-0.1 MeV with a width of 4.1+/-0.1 MeV, corresponding to the single GDR in the Pb-208 target. The sum energy of coincident gamma-gamma pairs shows a broad feature at 25.6+/-0.9 MeV with a Lorentzian width of 5.8+/-1.1 MeV, which we assign to the double GDR observed via the two-gamma decay channel.
Databáze: OpenAIRE