Cathode luminescence spectral studies of degassing and radiation stability of superconductor Y1Ba2Cu3O7–δ

The emission spectra of Y1Ba2Cu3O7–δ in the normal and superconducting phases have been studied under electron irradiation. This spectrum is found to change considerably during the superconducting transition. Cathode excitation makes it possible to remove the excess oxygen–nitrogen mixture while preserving the spectral singularities at the point Tc, as well as the temperature dependence of resistance. Long-term cathode excitation in vacuum with an overall dose of about 3000 J/cm2 results in a displacement of the transition and a decrease in the intensity of the emission spectrum.