Sedimentation of isotope atoms in monatomic liquid Se

Tsutomu Mashimo, Masao Ono, Xinsheng Huang, Yusuke Iguchi, Satoru Okayasu, Katsura Kobayashi, Eizo Nakamura

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


A strong gravitational field resulted in the sedimentation of isotope atoms in monatomic liquid. The concentration ratio Se82 Se76 increased by greater than 3.5% in specimen ultracentrifuged at (0.7-0.9) × 106 G and at 300 °C. The recovered sample had a feather-shaped crystalline morphology. The concentration gradient was nearly twice that of the steady state analytical result (ideal gas system), indicating a nonideal system diffusion. The present result is evidence of sedimentation of substitutional atoms in condensed matter via self-diffusion and suggestes its possible application to isotope separation, crystalline control, and matter dynamics in massive star.

Original languageEnglish
Article number231917
JournalApplied Physics Letters
Issue number23
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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