论文标题
质子辐照铝板的平衡前停止和电荷捕获
Pre-equilibrium stopping and charge capture in proton-irradiated aluminum sheets
论文作者
论文摘要
我们提出了一项对平衡前停止功率和弹丸电荷捕获的第一原理研究，该铝片被6-60 keV质子照射。我们的时间依赖性密度功能理论计算表明，与大容量铝相比，尤其是在入口层附近，停止功率增强了。我们提出了表面等离子体振荡的附加激发渠道，是对这种行为的最合理的解释。我们还引入了一种新型技术，以计算通过纸张传输后质子弹丸的轨道分辨电荷状态。我们的结果提供了对弹丸退出铝板后轨道职业动态的洞察力，并对推进辐射硬度和聚焦离子束技术具有重要意义，尤其是对于几层材料。
We present a first-principles study of pre-equilibrium stopping power and projectile charge capture in thin aluminum sheets irradiated by 6 - 60 keV protons. Our time-dependent density functional theory calculations reveal enhanced stopping power compared to bulk aluminum, particularly near the entrance layers. We propose the additional excitation channel of surface plasma oscillations as the most plausible explanation for this behavior. We also introduce a novel technique to compute the orbital-resolved charge state of a proton projectile after transmission through the sheet. Our results provide insight into the dynamics of orbital occupations after the projectile exits the aluminum sheet and have important implications for advancing radiation hardness and focused-ion beam techniques, especially for few-layer materials.
