Dipole strength distribution in 206Pb for the evaluation of the neutron-capture cross section of 205Pb

The dipole strength distribution of 206Pb was investigated via nuclear resonance fluorescence experiment using bremsstrahlung produced with an electron beam at a kinetic energy of 10.5 MeV at the linear accelerator ELBE. We identified 88 states resonantly excited at energies from 3.7 to 8.2 MeV. The photoabsorption cross sections were extracted from the measured scattering cross sections and the branching ratios. The present (gamma,gamma') data combined with (gamma, n) data from the literature were used as an input to the statistical calculation code CCONE to evaluate the neutron capture cross section of the unstable 205 Pb nucleus.