Charge exchange and energy loss of slow highly charged ions in 1 nm thick carbon nanomembranes.
Charge exchange and energy loss of slow highly charged ions in 1 nm thick carbon nanomembranes.
复制标题
DOI：
10.1103/physrevlett.112.153201
复制
发表时间：
2013-11
影响因子：
8.6
通讯作者：
R. Wilhelm;E. Gruber;R. Ritter;R. Heller;S. Facsko;F. Aumayr
中科院分区：
文献类型：
--
作者：
R. Wilhelm;E. Gruber;R. Ritter;R. Heller;S. Facsko;F. Aumayr
给出了慢速高电荷态Xe离子通过超薄聚合物碳膜的电荷交换和能量损失的实验数据。令人惊讶的是，观察到了两种不同的出射电荷态分布，并伴随着电荷交换相关的能量损失。具有较大电荷损失的离子的能量损失与入射电荷状态呈二次关系，表明平衡停止力值在这种情况下不适用。附加角度分辨透射点的测量值对弹性能量损失的贡献很大。观测结果表明，不同碰撞参数的区域可以分开，因此粒子在超薄固体靶中的能量沉积可能不能用单位长度的平均能量损失来描述。
Experimental charge exchange and energy loss data for the transmission of slow highly charged Xe ions through ultrathin polymeric carbon membranes are presented. Surprisingly, two distinct exit charge state distributions accompanied by charge exchange dependent energy losses are observed. The energy loss for ions exhibiting large charge loss shows a quadratic dependency on the incident charge state indicating that equilibrium stopping force values do not apply in this case. Additional angle resolved transmission measurements point on a significant contribution of elastic energy loss. The observations show that regimes of different impact parameters can be separated and thus a particle's energy deposition in an ultrathin solid target may not be described in terms of an averaged energy loss per unit length.