8th Japan-China-Korea Workshop on Microgravity Sciences for Asian Microgravity Pre-Symposium Isotope Distribution in Pure Indium after Liquid-State Centrifugation

An ultracentrifuge experiment was performed on a pure liquid-indium at centrifugal acceleration field of 8.2x10 g at 300°C for 100 hours. The isotope ratio measurements were performed on the centrifuged specimen, which was cooled and solidified before release the acceleration, with Secondary Ion Mass Spectrometer (CAMECA IMS-6f). In/In isotope ratio on the specimen changed with negative gradient in the direction of centrifugal acceleration approximately 1.4%. The measurement result indicated that the heavy In isotopes moved in the direction of the centrifugal acceleration and the light In isotopes moved in the counter direction in the specimen.