Statistical γ-Decay in s-d Shell Nuclei
1986; IOP Publishing; Volume: 33; Issue: 5 Linguagem: Inglês
10.1088/0031-8949/33/5/001
ISSN1402-4896
AutoresM. Guttormsen, A. Ataç, F. Ingebretsen, S. Messelt, Jeppe Olsen, T. Ramsøy, J. Rekstad, L A Rønning, G. Løvhøiden, T. Rødland, T.F. Thorsteinsen,
Tópico(s)Quantum Chromodynamics and Particle Interactions
ResumoThe γ-decay following the 27Al(τ, α), 27Al(τ, τ) and 27Al(τ, t) reactions has been studied using Eτ = 45 MeV. For all three reactions a maximum mean γ-ray multiplicity of ⟨Mγ⟩ = 1.8 ± 0.2 is observed, in good agreement with the Fermi gas model. The variation of ⟨Mγ⟩ with excitation energy for the 27Al(τ, τ)27Al reaction, however, shows considerable deviations from the decay pattern expected for a statistical system. From a comparison with other reaction channels, we suggest that the selectivity in the excitation of states in the inelastic process is responsible for this non-statistical pattern.
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