arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.1905cond-mat.mes-hall
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质子在碳纳米管中的扩散

Channeling of protons through carbon nanotubes

Duško Borka, Srdjan Petrović, Nebojša Nešković

摘要:

这本书包含了一个彻底的理论考虑质子通过碳纳米管通道的过程。我们首先非常简短的总结研究离子通道通过纳米管的理论和实验结果。然后,简要描述了离子沟道的形成过程。然后介绍了水晶彩虹效应。我们描述了它是如何被发现的,并提出了晶体彩虹理论,作为晶体和纳米管中离子通道的正确理论。我们继续与零度聚焦的质子通过纳米管通道的效果的描述。结果表明,通道质子的角分布与纳米管长度的演变可以划分在彩虹效应所定义的周期。进一步,我们分析了质子通过纳米管通道的角分布和彩虹现象。这是利用水晶彩虹理论完成的。利用计算机模拟方法生成了角度分布,并通过精确分析碰撞参量平面到透射角平面的映射,得到了相应的彩虹图样。我们证明,彩虹使角分布的充分解释。我们还研究了碳原子价电子的动态极化效应如何影响质子在真空中通过短纳米管传输和嵌入电介质中的角度和空间分布。此外,我们探讨了1 GeV质子通过纳米管束的沟道星效应,这出现在质子束的发散角大于临界角沟道。

英文摘要:

This book contains a thorough theoretical consideration of the process of proton channeling through carbon nanotubes. We begin with a very brief summary of the theoretical and experimental results of studying ion channeling through nanotubes. Then, the process of ion channeling is described briefly. After that, the crystal rainbow effect is introduced. We describe how it was discovered, and present the theory of crystal rainbows, as the proper theory of ion channeling in crystals and nanotubes. We continue with a description of the effect of zero-degree focusing of protons channeled through nanotubes. It is shown that the evolution of the angular distribution of channeled protons with the nanotube length can be divided in the cycles defined by the rainbow effect. Further, we analyze the angular distributions and rainbows in proton channeling through nanotubes. This is done using the theory of crystal rainbows. The angular distributions are generated by the computer simulation method, and the corresponding rainbow patterns are obtained in a precise analysis of the mapping of the impact parameter plane to the transmission angle plane. We demonstrate that the rainbows enable the full explanation of the angular distributions. We also investigate how the effect of dynamic polarization of the carbon atoms valence electrons influences the angular and spatial distributions of protons transmitted through short nanotubes in vacuum and embedded in dielectric media. In addition, we explore the channeling star effect in 1 GeV proton channeling through bundles of nanotubes, which appears when the proton beam divergence angle is larger than the critical angle for channeling.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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