Possibility to use of the Fe3O4/Ta2O5 core-shell nanoparticles in radiotherapy Kseniya Lukyanenko, Leonid Afremov, Vladimir Apanasevich, Mariya Shmykova, Mikhail Medkov, Pavel Lukyanov, Olga Tarakova and Vladimir Kustov EPJ Web Conf., 185 (2018) 10008 Published online: 04 July 2018 DOI: 10.1051/epjconf/201818510008