Abstract—

Features of the spatial evolution of a wave function that describes the motion of fast particles in a planar channel in the coherent channeling mode are considered. It is shown that the interference of eigenstates leads to modulation of the probability density of particle localization in the transverse channel cross section and the longitudinal direction of nonquantized motion if the parametric coupling of longitudinal momentum and the energy of transverse particle motion are taken into account. In the case of a very narrow wave packet, the spatial structure of the probability density is close to the classical particle trajectory. In the case of a particle whose state corresponds to a plane wave before its entrance into the channel, the interference process leads to longitudinal-transverse focusing and the formation of periodically located clusters with a very large probability density. As the entrance angle increases, the position of these clusters approaches the channel walls. In this paper, it is shown that the presence of such clusters leads to the possibility of forming similarly located clusters of excited atoms and nuclei and to a new type of generation of quasicoherent directional radiation.

中文翻译：

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相干通道模式下粒子的空间局部化特征及定向辐射的形成机理

摘要—

考虑了波函数的空间演化特征，该特征描述了相干通道模式下平面通道中快速粒子的运动。结果表明，如果考虑纵向动量和横向粒子运动能量的参数耦合，本征态的干扰会导致横向通道横截面和非量化运动的纵向方向上粒子定位概率密度的调制。在非常窄的波包的情况下，概率密度的空间结构接近经典的粒子轨迹。如果粒子的状态与进入通道之前的平面波相对应，干涉过程导致纵向横向聚焦，并形成概率密度非常大的周期性定位的簇。随着入射角的增加，这些簇的位置接近通道壁。在本文中，表明这种团簇的存在导致形成激发原子和原子核位置相似的团簇的可能性，并导致了新型的准相干定向辐射的产生。