Hydrogen isotope behavior in Li2O

Recent progress of the study about hydrogen isotope behavior in Li2O made by IR absorption spectroscopy was introduced. Various O-D states have been observed, and their behaviors were separately analyzed. In the results, the transition among various O-D states during ion irradiation or heating were clarified, and important values, such as the apparent activation energy for the decomposition of LiOD phase on the interface, were estimated. The hydrogen isotope behavior in Li2O containing radiation defects has been partly elucidated in an atomic scale in comparison with the reported results of quantum chemical calculation. We are undertaking further calculation to verify the obtained experimental information and to define the influence of defects. (author)