Perturbation theory of scattering for grazing-incidence fast-atom diffraction
Perturbation theory of scattering for grazing-incidence fast-atom diffraction
复制标题
掠入射快原子衍射的散射扰动理论
DOI：
10.1039/d2cp01013e
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发表时间：
2022
影响因子：
3.3
通讯作者：
Allison W
中科院分区：
文献类型：
--
作者：
Allison W
最近的掠入射、快原子衍射（GIFAD）实验强调了众所周知的观察结果，即经典彩虹角之间的距离取决于入射能量。 GIFAD 实验意味着入射垂直散射角，有助于使用经典微扰理论进行分析分析，从而得出这样的结论：Bocan 等人定义的所谓“动态波纹”振幅。 Rev. Lett., 2020 125, 096101 在一阶微扰理论中，与彩虹角的正切成正比。因此，除了从彩虹角度及其能量依赖性收集的信息之外，它没有提供有关相互作用的更多信息。也许更重要的是，由此产生的分析理论揭示了彩虹角的能量依赖性如何可以转化为控制入射射弹与表面相互作用的力场的信息。
Recent grazing-incidence, fast atom diffraction (GIFAD) experiments have highlighted the well known observation that the distance between classical rainbow angles depends on the incident energy. The GIFAD experiments imply an incident vertical scattering angle, facilitating an analytic analysis using classical perturbation theory, which leads to the conclusion that the so called “dynamic corrugation” amplitude, as defined by Bocan et al., Phys. Rev. Lett., 2020 125, 096101 is, within first-order perturbation theory, proportional to the tangent of the rainbow angle. Therefore it provides no further information about the interaction than is gleaned from the rainbow angle and its energy dependence. Perhaps more importantly, the resulting analytic theory reveals how the energy dependence of rainbow angles may be inverted into information on the force field governing the interaction of the incident projectile with the surface.