论文标题
原子上通风电子数据包的弹性散射
Elastic scattering of Airy electron packets on atoms
论文作者
论文摘要
对于基态和Yukawa电位的氢原子，电子在潜在磁场上弹性散射的问题被认为是考虑的。证明散射概率密度的角度依赖性通常是方位角不对称的。当原子的位置与通风梁概率密度的最小值一致时，不对称图案由四个分离的峰表示。我们表明，这种行为对定义原子和最小值的相对位置的精度非常敏感，并研究以波包的横向大小来测量的位置的不确定性如何影响方位角不对称的观察。最后，我们考虑了一个空间局部的目标，并讨论了观察到超过梁参数确定的临界值和目标中心位置的临界值的目标方位不对称的困难。
The problem of elastic scattering of electron Airy beams on potential fields is considered for a hydrogen atom in the ground state and for Yukawa potential. It is demonstrated that the angular dependence of the scattering probability density is in general azimuthally asymmetric. When the position of the atom happens to coincide with one the minima of the probability density of the Airy beam the asymmetric pattern is represented by four separated peaks. We show that this behaviour is very sensitive to the precision with which the relative position of the atom and the minima is defined and study how uncertainty in the position measured in terms of the transverse size of the wave-packet affects observation of azimuthal asymmetry. Finally, we consider a spatially localized target and discuss the difficulties of observing the azimuthal asymmetry for targets with sizes that exceed the critical value determined by the beam parameters and the position of the target center.
