Discussion on the Standardization of Shielding Materials — Sensitivity Analysis of Material CompositionsTomohiro Ogata, Ken-ichi Kimura, Mikihiro Nakata, Koichi Okuno, Takayuki Hirouchi, Naofumi Kawano, Koji Oishi, Ken-ichi Tanaka, Toshio Amano and Yoshihiro HiraoEPJ Web Conf., 153 (2017) 02004DOI: https://doi.org/10.1051/epjconf/201715302004