EVALUATION OF THE DISPLACEMENT ENERGY OF GD ATOMS IN GDBA2CU3O7-DELTAFROM EXPERIMENTAL-DATA

The processing of experimental data on Gd-containing high-temperature superconductor degradation resulting from thermal neutron irradiation has made it possible to evaluate the ratio of the degradation rates of GdBa2Cu3O7-delta enriched with Gd-155 and Gd-157 isotopes respectivel y. The defect production in the compound due to (n, gamma) reactions o n Gd nuclei and consequent recoil of Gd nuclei emitting gamma-quanta w as simulated with experimentally determined gamma-spectra by a Monte C arlo technique. The displacement probabilities p(d)((155)) and p(d)((1 57)) for different threshold energies E(d) and the threshold energy of Gd atom displacement producing disordered bubbles in GdBa2Cu3O7-delta , E(d) approximate to 150 eV, were obtained.