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Report No.

Isotope fluctuation in indium-lead alloy induced by solid centrifugation

Ono, Masao ; Iguchi, Yusuke*; Okayasu, Satoru ; Esaka, Fumitaka ; Kobayashi, Katsura*; Hao, T.; Bagum, R.*; Osawa, Takahito ; Fujii, Kimio; Nakamura, Eizo*; Mashimo, Tsutomu

The atomic-scale graded structure of In-Pb alloy was formed by an ultracentrifuge experiment under conditions that a gravitational field of 810,000 G for 100 hours at 150$$^{circ}$$C (solid state) in our previous study. The isotope fluctuation on this sample was measured using secondary ion mass spectrometer (SIMS). The ratio both $$^{208}$$Pb/$$^{206}$$Pb and $$^{115}$$In/$$^{113}$$In changed with positive gradient in the direction of centrifugal force approximately 1.2%. These isotope fluctuations were larger than that of starting state of natural state (In$$<$$0.2%, Pb$$<$$0.1%). These show that the sedimentation of isotopes occurred by solid centrifugation in this alloy, although achieved concentration gradients were small.



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Category:Nuclear Science & Technology



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