Pre-equilibrium stopping and charge capture in proton-irradiated aluminum sheets
Pre-equilibrium stopping and charge capture in proton-irradiated aluminum sheets
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DOI：
10.1103/physrevb.102.165401
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发表时间：
2020-06
影响因子：
3.7
通讯作者：
A. Kononov;A. Schleife
中科院分区：
文献类型：
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作者：
A. Kononov;A. Schleife
我们提出了第一性原理研究的预平衡阻止本领和弹丸电荷捕获薄铝片6 - 60 keV的质子照射。我们的含时密度泛函理论计算揭示了增强的阻止本领相比，散装铝，特别是附近的入口层。我们提出了表面等离子体振荡的额外激发通道作为这种行为的最合理的解释。我们还介绍了一种新的技术来计算质子射弹传输后通过片材的轨道分辨的电荷状态。我们的研究结果提供了深入了解后，弹丸退出铝片的轨道职业的动态和先进的辐射硬度和聚焦离子束技术，特别是对少层材料具有重要意义。
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.