论文标题
在LIF（001）表面吸引人的孔中快速NE原子的折射
Refraction of fast Ne atoms in the attractive well of LiF(001) surface
论文作者
论文摘要
在从LIF（001）表面放牧的入射角下，将具有高达3 KEV的能量的NE原子衍射。对于垂直于表面的入射光束的一小部分动量成分，我们观察到弹性彩虹角的增加，并扩大非弹性散射曲线。我们将这两种效应解释为在表面电势的有吸引力部分中原子波的折射。我们使用快速，严格的动力学衍射计算来找到一个弹丸表面电势模型，该模型可以定量重现实验数据，以最多十个衍射顺序。这使我们能够提取有吸引力的潜在井深度为10.4 MeV。我们的结果为更精致的表面电势模型树立了基准，其中包括弱范德华地区，这是原子表面相互作用研究的长期挑战。
Ne atoms with energies up to 3 keV are diffracted under grazing angles of incidence from a LiF(001) surface. For a small momentum component of the incident beam perpendicular to the surface, we observe an increase of the elastic rainbow angle together with a broadening of the inelastic scattering profile. We interpret these two effects as the refraction of the atomic wave in the attractive part of the surface potential. We use a fast, rigorous dynamical diffraction calculation to find a projectile-surface potential model that enables a quantitative reproduction of the experimental data for up to ten diffraction orders. This allows us to extract an attractive potential well depth of 10.4 meV. Our results set a benchmark for more refined surface potential models which include the weak Van der Waals region, a long-standing challenge in the study of atom-surface interactions.
