Internal Anisotropy of Collision Cascades

Details Internal Anisotropy of Collision Cascades Internal Anisotropy of Collision Cascades

1997-03-22

arxiv.org/abs/cond-mat/9703194v1

Physics

Condensed Matter

Statistical Mechanics

RevteX, 8 pages, 6 .eps figures included

Scientific paper

10.1103/PhysRevE.56.2019

We investigate the internal anisotropy of collision cascades arising from the branching structure. We show that the global fractal dimension cannot give an adequate description of the geometrical structure of cascades because it is insensitive to the internal anisotropy. In order to give a more elaborate description we introduce an angular correlation function, which takes into account the direction of the local growth of the branches of the cascades. It is demonstrated that the angular correlation function gives a quantitative description of the directionality and the interrelation of branches. The power law decay of the angular correlation is evidenced and characterized by an exponent and an angular correlation length different from the radius of gyration. It is demonstrated that the overlapping of subcascades has a strong effect on the angular correlation.

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