Measurement of scattering cross sections of ^natPb at an incident neutron energy of 2.94 MeV

Abstract
At the PTB TOF spectrometer, cross sections were measured for the elastic and inelastic scattering of neutrons on ^natPb at an incident neutron energy of E_n = 2.94 MeV. The ¹⁵N(p,n)¹⁵O reaction was used for the production of monoenergetic neutrons. Measurements were carried out at 10 angles from 25° to 130°. Angle-integrated cross sections were obtained by fitting a Legendre polynomial expansion to the experimental data. Cross sections could be determined for the elastic scattering on ^natPb as well as for inelastic scattering with excitation of the 1^st level of ²⁰⁶Pb and the 1^st and 2^nd level of ²⁰⁷Pb. The cross sections were normalized to the ENDF/B-V hydrogen scattering cross section. The preliminary results are compared with existing experimental and evaluated data, i.e. cross section data of the ENDF/B-VI.8 and JENDL 3.3 evaluations. Additional measurements in the energy range from 2 MeV to 4 MeV are in progress.