Isotope distribution in pure indium after liquid-state centrifugation

Ono, Masao  ; Okayasu, Satoru  ; Esaka, Fumitaka  ; Haruki, Rie; Mashimo, Tsutomu*

An ultracentrifuge experiment was performed on a pure liquid-indium at acceleration field of 8.210 g at 300C for 100 hours. The isotope ratio measurements were performed on the centrifuged specimen with Secondary Ion Mass Spectrometer (CAMECA IMS-6f). In/In isotope ratio on the specimen changed with negative gradient in the direction of centrifugal force approximately 1.3%. The measurement result indicated that the heavy In isotopes moved in the direction of the centrifugal force and the light In isotopes moved in the counter direction in the specimen. At the session, we will present both the result and an approach to find a precondition to develop an isotope separation process using the phenomenon.