Isotope fractionation due to sedimentation of atoms in centrifuged indium-lead alloy

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 0.8110 $^{6}$ G for 100 hours at 150 $^{circ}$ C in solid state in our previous study. The isotope ratio measurements were performed on the centrifuged sample with secondary ion mass spectrometer (SIMS, CAMECA IMS-6f). Both $^{115}$ In/ $^{113}$ In and $^{208}$ Pb/ $^{206}$ isotope ratio changed with negative gradient in the direction of centrifugal force approximately 1.2% showing the tendency that the heavy $^{115}$ In isotope ( $^{208}$ Pb isotope) abundance increased and light $^{113}$ In isotope ( $^{206}$ Pb isotope) abundance decreased in the direction of centrifugal force. This showed that the isotope fractionation effect due to sedimentation of atoms occurred in this alloy by ultracentrifuge experiment.

Language	:	Japanese
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Meeting title	:	日本金属学会2008年春期(第142回)大会
Held date	:	2008/03
Location (city)	:	東京
Location (country)	:	日本
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Keywords	:	no keyword
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Cooperating Institute	:	熊本大学

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Registration No. : BB20073443
JAEA Abstracts No. :
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