Kunihiko Nishiizumi

Interest in cosmochemistry and Nuclear chemistry. Research involved cosmic ray exposure histories of extraterrestrial materials (meteorites, lunar samples, and micrometeorites) and terrestrial materials (surface rocks and soils) using cosmic-ray produced (cosmogenic) nuclides such as 129I, 53Mn, 10Be, 26Al, 36Cl, and 41Ca; secular variation of solar and galactic cosmic rays.