Diffusion-limited coalescence and annihilation in random media

被引：10

作者：

Mandache, C

ben-Avraham, D ^{[1
]}

机构：

[1] Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA

[2] Clarkson Univ, Clarkson Inst Stat Phys, Potsdam, NY 13699 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.481365

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We study the kinetics of diffusion-limited coalescence, A+A --> A, and annihilation, A+A --> 0, in random media consisting of disconnected domains of reaction. Examples include exciton fusion and annihilation in porous matrices and along polymer chains. We begin with an exact analysis of A+A --> A in a finite segment. This result is applied to coalescence in a random distribution of segment lengths, and the implications for coalescence and annihilation in percolation clusters and other confined geometries are then derived by means of scaling techniques. (C) 2000 American Institute of Physics. [S0021-9606(00)50712-0].

引用

页码：7735 / 7740

页数：6

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