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ID 30208
フルテキストURL
著者
Totsuji, Hiroo Okayama University
Ogawa, Takafumi Okayama University
Totsuji, Chieko Okayama University
Tsuruta, Kenji Okayama University
抄録

The structure of spherical clusters composed of Yukawa particles is analyzed by molecular dynamics simulations and theoretical approaches as a model for dust particles in dusty plasmas in the isotropic environment. The latter condition is expected to be realized under microgravity or by active cancellation of the effect of gravity on the ground. It is found that, at low temperatures, Yukawa particles form spherical shells and, when scaled by the mean distance, the structure is almost independent of the strength of screening including the case of the Coulomb interaction. The positions and populations of shells and the conditions for the change of the number of shells are expressed by simple interpolation formulas. Shells have an approximately equal spacing close to that of triangular lattice planes in the bulk close-packed structures. It is shown that, when the cohesive energy in each shell is properly taken into account, the shell model reproduces the structure of spherical Yukawa clusters to a good accuracy.

キーワード
coulomb crystals
simulation
energy
charge
備考
Digital Object Identifer:10.1103/PhysRevE.72.036406
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review E, September 2005, Volume 72, Issue 3, Pages 6.
Publisher URL:http://dx.doi.org/10.1103/PhysRevE.72.036406
Direct access to Thomson Web of Science record
Copyright © 2005 The American Physical Society. All rights reserved.
発行日
2005-9
出版物タイトル
Physical Review E
72巻
3号
資料タイプ
学術雑誌論文
言語
English
査読
有り
DOI
Web of Sience KeyUT
Submission Path
electricity_and_magnetism/182