Measurement Of Scattering Cross Sections Of (Nat)Pb At An Incident Neutron Energy Of 2.94 Mev

At the PTB TOF spectrometer, cross sections were measured for the elastic and inelastic scattering of neutrons on (nat)Pb at an incident neutron energy of E(n) = 2.94 MeV. The (15)N(p,n) (15)O reaction was used for the production of monoenergetic neutrons. Measurements were carried out at 10 angles from 25 degrees to 130 degrees. 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 (nat)Pb as well as for inelastic scattering with excitation of the 1st level of (206)Pb and the 1(st) and 2(nd) level of (207)Pb. The cross sections were non-nalized 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.