Displacement cross-sections for tantalum and tungsten irradiated with protons at energies up to 1Â GeV

The displacement cross-sections have been analyzed for tantalum and tungsten irradiated with protons at energies from several keV up to 1 GeV using different nuclear models and approaches to obtain the number of defects in irradiated material. The displacement cross-section for proton elastic scattering has been obtained using the data from ENDF/B-VI Proton Sublibrary and with the help of an optical model. The nonelastic displacement cross-section has been calculated by means of various nuclear models incorporated in the MCNPX code. The number of defects produced under high energy proton irradiation was calculated with the help of a combination of binary collision approximation and molecular dynamics models.