The 205Tl γ-ray strength function below 7.5 MeV

Abstract The 205 Tl γ-ray strength function below 7.5 MeV is derived from a measurement with 3% energy resolution of the 205 Tl(γ, γ) 205 Tl cross section between 3.5 and 7.5 MeV. This strength function is found to be similar to those extracted from (n, γ) data in the neighbouring Tl isotopes. The structure observed in the Tl strength function below 7.5 MeV is consistent with that predicted from recent particle-hole calculations for 208 Pb.