Piqueras De Noriega, Francisco JavierFernández Sánchez, PalomaVicent López, José Luis2023-06-202023-06-201990-12-170003-695110.1063/1.104196https://hdl.handle.net/20.500.14352/59294© Amer Inst Physics. This work was partially supported by CICYT (Projects BP86-0151 and MAT 88-251-CO 2-02). The infrared equipment was donated by Alexander von Humboldt stiftung.Changes in the visible and infrared cathodoluminescence(CL)spectra of YBa2Cu3O7−x are detected during irradiation in the scanning electron microscope. Results indicate the influence of oxygen content on the appearance of a CL band at 450–600 nm. In irradiated samples an infrared band at 1600–1700 nm has been observed.engjournal articlehttp://dx.doi.org/10.1063/1.104196http://scitation.aip.orgopen access538.9Física de materiales