In the keV-energy regime, the scattering of krypton ions off a copper sample has been studied. In addition to the broad energy spectrum arising from multiple-collision scattering, the energy distributions of the backscattered ions exhibit prominent peaks at energies where single-collision (SC) scattering peaks are expected. Such SC peaks were shown to be absent in Sn – Mo/Ru scattering, systems of similar mass ratio and thus similar kinetics. The present Kr on Cu results allow for a comparison to a simulation package as SRIM. An important difference found between the present experiment and the predictions of SRIM is that the SC contribution is observed to decrease with scattering angle, whereas SRIM predicts this contribution to be constant. The intensity of the experimental SC peaks, though much weaker than in the SRIM simulations, may be used as markers to improve SRIM in its description of low-energy heavy particle scattering off surfaces.

在keV能量方案中，已经研究了k离子从铜样品中的散射。除了由于多碰撞散射而产生的宽能谱之外，反向散射离子的能量分布在预期单碰撞（SC）散射峰的能量处显示出明显的峰。此类SC峰显示为在Sn-Mo / Ru散射中不存在，其质量比和动力学相似。当前的Cu上Kr结果可以与仿真包SRIM进行比较。在本实验与SRIM的预测之间发现的一个重要区别是，观察到SC的贡献随散射角的减小而减小，而SRIM则预测此贡献是恒定的。实验性SC峰的强度，尽管比SRIM模拟中弱得多，