文章研究了电子高速运动时所产生的横向振动。实验方法是利用半圆聚焦β-谱仪上90Sr源β-粒子在不同磁场下对于相同弯曲半径下β-粒子具有不同的能量和动量的特性，研究这些β-粒子在通过不同宽度的铜狭缝（厚8 mm）时的粒子数n和铜狭缝宽度δ的函数关系，发现不管β-粒子具有什么能量和动量，都具有横向运动的趋势和在铜狭缝中出现了台阶分布。其原因可能是β-粒子本身具有横向振幅A和周围真空起伏能量的相互作用。

This paper researches the electrons horizontal vibration when the electrons have high velocity. Its experimental method is using the characteristics that β-particles of 90Sr source in different magnetic fields by half circle-focus β- spectrum and in the same radius have different energy and momentum to study the functional relationship between the particle number (n) and the width of the copper narrow slot (δ) when the particles fly across the copper narrow slots with different widths (thickness is 8 mm)and find that the β-particles have the horizontal movement tendency no matter what energy and momentum the β-particles have, and when they fly across the copper narrow step there is the distribution of a flight of steps. The reason may be that β-particles have the horizontal amplitude A and the interaction of energy fluctuation in vacuum.