Calculations of neutron damage cross-sections in silicon, gallium arsenide and iron

The neutron cross-section processing code NJOY has been modified to calculate total displacements kerma cross-sections for silicon, gallium, arsenic and gallium arsenide. The modified NJOY is also used to calculate the displacement cross-sections for iron.NJOY was further modified to calculate partially integrated differential displacements kerma cross-sections or displacement kerma matrix elements for neutron interaction in Si and GaAs. The theory behind the calculation of the displacement kerma matrix is also extended to calculate the displacement per atom (dpa) cross-sections for production of displacements in cascades of specific size ranges in iron.Published models of Simons and Wiedersich were used to obtain modified response functions for the production of stable defects at low temperature and for free defect survival, respectively, in iron. The effects of these different response functions on the energy ranges of significance in various neutron spectra have also been calculated.The displacement energy calculated by the Monte-Carlo code MARLOWE is used to adjust the displacement energy calculated by the Lindhard partition function in NJOY for silicon and iron.U of I OnlyETDs are only available to UIUC Users without author permissio