A strong gravitational field resulted in the gravity-induced diffusion (sedimentation) of isotope atoms in monoatomic solid Se. The layer crystalline morphology consisting of three zones of the fine-grained crystals, the long crystals and feather-shaped crystals grown parallel to gravity direction appeared in the specimen ultracentrifuged at (0.8–1)×106 G and at 190°C. Change in the concentration ratio 82Se/76Se of >0.8% was observed in the grown crystalline region. These results show an evidence for the sedimentation of substitutional atoms in solids via self-diffusion, and suggest the possibility of application to the control of impurity and crystalline states as well as to isotope separation.
@article{20100403102546217.admin,
author = "Mashimo, Tsutomu and Ono, Masao and Huang, X. S. and Iguchi, Yusuke and Okayasu, Satoru and Kobayashi, Katsura and Nakamura, E.",
title = "Gravity-induced diffusion of isotope atoms in monoatomic solid Se",
journal = "A Letters Journal Exploring The Frontiers of Physics",
year = "2008",
number = "5",
volume = "81",
pages = "56002",
doi = "10.1209/0295-5075/81/56002",
}
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