Some results of regular algorithm applying in the EELFS method

The EELFS spectra of both polycrystals (Cu, Ni) and monocrystal (Ni) have been obtained at different energies of the primary electron beam ( from 850 to 2900 eV ) after ion etching and after isothermal ( from 450 to 550 K ) and recrystallization annealing. The calculation of experimental and model functions of atoms radial distribution was performed using the Tikhonov's regularisation method taking into consideration the transitions contributions into s- and d-states. The probable causes of the observed variance ( with reference to bulk values ) in the atom bond lengths of the first coordination sphere in surface layers are discussed.