Target mass dependence of photoneutron spectrum for 16.6 MeV photons on medium-heavy mass targets Toshiya Sanami, Tyuet Kim Tran, Hiroshito Yamazaki, Toshiro Itoga, Yoichi Kirihara, Yoshihito Namito, Yasuhito Sakaki, Shuji Miyamoto and Yoshihiro Asano EPJ Web of Conf., 284 (2023) 01047 Published online: 26 May 2023 DOI: 10.1051/epjconf/202328401047