Paper Title:
Isotope Fractionation due to Sedimentation of Atoms in Centrifuged Indium-Lead Alloy
  Abstract

The atomic-scale graded structure of In-Pb alloy was formed by an ultracentrifuge under a gravitational field of 0.81 x 106 g for 100 hours at 150 °C in solid state. The isotope ratio measurements were performed on the centrifuged sample with secondary ion mass spectrometer (SIMS, CAMECA IMS-6f). 206Pb/208Pb and 207Pb/208Pb isotope ratio changed with negative gradient in the direction of centrifugal force approximately 1.5% and 0.8%, respectively. There was a tendency that the heavy 208Pb isotope abundance increased and the light 206Pb isotope abundance decreased in the direction of centrifugal force. Three-isotope diagram of 206Pb/208Pb versus 207Pb/208Pb proved that the isotope fractionation depends on the isotopic mass difference. These results showed that a strong gravitational field not only affected the inter-diffusion but also the self-diffusion in this alloy by causing isotope fractionation effect, which was dependent on the mass-difference.

  Info
Periodical
Defect and Diffusion Forum (Volumes 289-292)
Edited by
A. Agüero, J.M. Albella, M.P. Hierro, J. Phillibert and F.J. Pérez Trujillo
Pages
63-68
DOI
10.4028/www.scientific.net/DDF.289-292.63
Citation
M. Ono, Y. Iguchi, S. Okayasu, F. Esaka, K. Kobayashi, T. Hao, R. Bagum, T. Osawa, K. Fujii, E. Nakamura, T. Mashimo, "Isotope Fractionation due to Sedimentation of Atoms in Centrifuged Indium-Lead Alloy", Defect and Diffusion Forum, Vols. 289-292, pp. 63-68, 2009
Online since
April 2009
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$32.00
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