径向分布函数

在统计力学中，粒子系统（原子、分子、胶体，……）中，径向分布函数, (也叫做对关联函数) $g(r)$ 为相距参考粒子 $r$ 处粒子的密度。

对于均匀和各项同性体系，设参考粒子处于原点 O，粒子平均数密度为 $\rho =N/V$ ，距离 O $r$ 处局域时间平均密度为 $\rho g(r)$ 。

单词	Radial distribution function
释义	Radial distribution function 中文百科径向分布函数在统计力学中，粒子系统（原子、分子、胶体，……）中，径向分布函数, (也叫做对关联函数) $g(r)$ 为相距参考粒子 $r$ 处粒子的密度。对于均匀和各项同性体系，设参考粒子处于原点 O，粒子平均数密度为 $\rho =N/V$ ，距离 O $r$ 处局域时间平均密度为 $\rho g(r)$ 。英语百科 Radial distribution function 径向分布函数 In statistical mechanics, the radial distribution function, (or pair correlation function) $g(r)$ in a system of particles (atoms, molecules, colloids, etc.), describes how density varies as a function of distance from a reference particle. If a given particle is taken to be at the origin O, and if $\rho =N/V$ is the average number density of particles, then the local time-averaged density at a distance $r$ from O is $\rho g(r)$ . This simplified definition holds for a homogeneous and isotropic system. A more general case will be considered below.
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Radial distribution function