Interaction of Proton Beam with Massive Lead Target at Energy up to 100 GeV

An interaction of the proton beam of 1, 10, and 100 GeV with extended lead targets of cylindrical shape and of two different dimensions is considered: the 'small' target is of radius R=10 cm, length L=60 cm and of mass 214 kg; the 'large' target is of R=50 cm, L=200 cm and of mass 17.8 tons. Monte Carlo simulation of average numbers of reactions of different types in the targets and of neutron yield as well is performed with the universal hadron transport code SHIELD. It is demonstrated that no essential qualitative change in the general picture of the interaction and in the shape of neutron spectra occurs with the proton beam energy: increase of number of reactions and of intensity of neutron flux takes place only. Fission of nuclei of lead does not play any essential role: the share of fission reactions does not exceed 1