High pressure neutron scattering experiments on hydrogen storage materials

Machida, Akihiko; Otomo, Toshiya*; Hattori, Takanori   ; Fukazawa, Hiroshi

We have investigated the fundamental properties of metal hydrides or hydrogen storage materials. The interest is focused on basic understanding of the hydrogen-metal interactions in metal hydride systems. Neutron scattering technique, which is capable of determining hydrogen positions and bonding states, is a key tool to investigate the interactions, and becomes significantly powerful when combined with high pressure technique, which realizes high hydrogen density states by compression of metal lattices. In this article, we present high-pressure neutron scattering techniques using Paris-Edinburgh cell and hydrogen-gas cell under development at J-PARC and JRR-3.