[en] Micro-Raman and photoluminescence spectra of nitrogen-doped chemical vapour deposition (CVD) diamond films were studied. Spectra reveal the presence of diamond and graphitic carbon fractions in the sample and the presence of nitrogen-containing defects with luminescence lines peaking at 575 and 637 nm. Neutron irradiation of the sample sufficiently increases the broadband emission at 580 nm, subsequent annealing suppresses the broadband luminescence and increases the zero-phonon lines belonging to the nitrogen-vacancy defects.(author)