辐照引起的每层晶格原子的脱位数与该层晶格原子总数之比随着原子层数的增加按指数函数规律减少;

• 2) The ratio of the number of dislocated atoms which the ion beam resulted in to the sum of the atoms of this layer which these dislocated atoms were situated in decreased as a exponential function of the index of the layer.