1. Calculate the number of Frenkel defects generated by 28 KeV N₂⁺ ions in Si and diamond, taking into account primary and subsequent collision losses, assuming displacement threshold energy for Si to be 15eV and diamond 80eV, and compare this damage with that produced by 1MeV electrons.
2. Calculate the number of N-V defects in 5nm diamond spherical particle, if diamond is formed by carbon melting and quenching from 4000K, assuming the formation energy of vacancy to be 3.0eV.