Ultrafast Proton/Deuteron Dynamics in Solid Oxide Observed with Infrared Pump-Probe Spectroscopy Atsunori Sakurai, Koji Ando and Satoshi Ashihara EPJ Web Conf., 205 (2019) 04024 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920504024