Ag isotope fractionation in a centrifuged -AgI super-ionic conductor

Ono, Masao; Okayasu, Satoru; Iguchi, Yusuke*; Esaka, Fumitaka; Bagum, R.*; Haruki, Rie; Mashimo, Tsutomu*

no journal, , 

The ultracentrifuge experiment was performed on an -AgI super-ionic conductor at acceleration field of 6.110 g at 220C for 100 hours. From the analysis using Electron Probe Micro Analyzer (EPMA) and micro-area X-Ray Diffractometer, it was confirmed that the centrifuged specimen kept its stoichiometry. The isotope ratio measurements were performed on the centrifuged specimen with Secondary Ion Mass Spectrometer (SIMS). Ag/Ag isotope ratio on the specimen changed with negative gradient in the direction of centrifugal force approximately 1.5%. These observations indicated that the heavy Ag isotopes moved in the direction of the centrifugal force and the light Ag isotopes moved in the counter direction keeping charge balance in the specimen.