Oxygen mobility in yttrium hydride films studied by isotopic labelling Dmitrii Moldarev, Camille Aracheloff, Marcos V. Moro, Eduardo Pitthan, Max Wolff and Daniel Primetzhofer EPJ Web Conf., 261 (2022) 01001 Published online: 11 April 2022 DOI: 10.1051/epjconf/202226101001