Supernumerary rainbows in the angular distribution of scattered projectiles for grazing collisions of fast atoms with a LiF(001) surface.
Supernumerary rainbows in the angular distribution of scattered projectiles for grazing collisions of fast atoms with a LiF(001) surface.
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快速原子与 LiF(001) 表面掠碰撞的散射射弹角分布中的多余彩虹。
DOI：
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发表时间：
2008
影响因子：
8.6
通讯作者：
H. Winter
中科院分区：
文献类型：
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作者：
A. Schüller;H. Winter
具有 keV 能量的快原子从干净平坦的 LiF(001) 表面以掠射角散射。对于沿表面平面内的低折射率方位角方向的散射（“轴向表面沟道”），我们观察到归因于“多余彩虹”的散射射弹的角度分布中明显的峰值结构。这种现象只能在量子散射的框架中理解，并且在这里可以在高达 20 keV 的射弹能量下观察到。我们证明，可以高精度导出快速原子射弹表面的相互作用势，特别是其波纹。
Fast atoms with keV energies are scattered under a grazing angle of incidence from a clean and flat LiF(001) surface. For scattering along low index azimuthal directions within the surface plane ("axial surface channeling") we observe pronounced peak structures in the angular distributions for scattered projectiles that are attributed to "supernumerary rainbows." This phenomenon can be understood in the framework of quantum scattering only and is observed here up to projectile energies of 20 keV. We demonstrate that the interaction potential and, in particular, its corrugation for fast atomic projectiles at surfaces can be derived with a high accuracy.