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Vibration of a disordered chain: A model to investigate light absorption of amorphous grain

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Abstract

Vibration of a two-component disordered chain of 500 atoms is investigated. The mass ratio is 28:16. Squared frequency-spectra are obtained for several cases with different degrees of disorder. For a simple case eigenvectors are also calculated to show that there exists a local vibration mode at disorder. If there is an additional impurity atom in the chain, there appear localized vibration modes at the impurity atom above the optical branch and between the optical and the acoustical branches. Vibration of the chain with variable force constants, which are governed by a probability distribution, is studied as a model for a glassy substance.

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Authors and Affiliations

  1. Dept of Astronomy, Faculty of Science, University of Tokyo, Japan

    Takashi Onaka, Yoshikazu Nakada & Fumio Kamijo

Authors
  1. Takashi Onaka
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  2. Yoshikazu Nakada
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  3. Fumio Kamijo
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Additional information

Invited contribution to the Proceedings of a Workshop onThermodynamics and Kinetics of Dust Formation in the Space Medium held at the Lunar and lanetary Institute, Houston, 6–8 September, 1978.

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Onaka, T., Nakada, Y. & Kamijo, F. Vibration of a disordered chain: A model to investigate light absorption of amorphous grain. Astrophys Space Sci 65, 259–273 (1979). https://doi.org/10.1007/BF00648495

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  • DOI: https://doi.org/10.1007/BF00648495

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