9:30 AM - 11:30 AM [19a-PB3-2] Radiative and Non-Radiative Transitions in SrAl2O4:Eu,Dy long afterglow phosphors 〇Naoko Arie1, Koyu Oota1, Yuto Hori1, Haruki Fukada1, Atsushi Yamaguchi1 (1.KIT)