Binding order model applied for the irradiated diamond

Carbon interatomic distance dependence on the binding order is given in the paper. Contributions into diamond lattice expansion from the interstitial atoms and to its compression from vacancies are evaluated. On the basis of this model the relation connecting irradiated diamong lattice expansion with concentration of Frenkel pairs is obtained. According to the same binding order model the values of the mean-square static atomic displacements and the stored energy of irradiated diamond saturated by point defects are calculated; effect of nitrogen impurities on the parameter of the diamong crystal lattice is also evaluated. The calculated values of these parameters are shown to agree with the experiment