## Abstract

We consider the time scales for the observation of diffusion in small cluster systems. Molecular-dynamics calculations are performed to investigate the long-time behavior of the velocity autocorrelation function for the finite system. It is found that the resulting power spectrum exhibits liquidlike behavior over frequencies larger than those corresponding to large-amplitude motion across the boundaries of the cluster. The results are consistent with an interpretation of the cluster as a finite mixing system exhibiting decay of correlations and zero diffusion constant. The decay to zero diffusion constant as approaches zero occurs in a nearly singular fashion.

Original language | English |
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Pages (from-to) | 5019-5021 |

Number of pages | 3 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 42 |

Issue number | 8 |

DOIs | |

State | Published - 1990 |

Externally published | Yes |