Brillouin spectroscopy study of the radiation resistance of ferroelectric copolymer filled with Al2O3 and ZnO nanoparticlesSawsen Rouabah, Brice Vincent, Abdelhafid Chaabi, Didier Rouxel and Sylvain GirardEur. Phys. J. Appl. Phys., 77 3 (2017) 30701DOI: https://doi.org/10.1051/epjap/2017160383