4-4 Double-slit Interferences Observed in Dielectronic Transitions in Collisions of H2+ on Helium

Young's double-slit interference is a clear manifestation of the wave character of light. The feasibility of an atomicversion of Young's double slit experiment for matter waves in ion-atom collisions was first discussed theoreticallyby Tuan and Gerjuoy in 1960[1]. They studied capture processes in collisions of protons with H2 and suggestedthat diffraction of the protons from the two atomic centers of the molecule could lead to interference effects. Suchinterference effects are more difficult to observe in ionization processes, since there the final state of the collisioninvolves at least three unbound particles. The experimental observation of this process is particularly challengingbecause the determination of the phase angle in such processes is not straightforward.

表面硬化零部件的成形和热处理对结晶粒度和疲劳强度的影响

表面硬化钢的结晶粒度对于加工和零件承载能力是一个重要的特性。钢材使用者通常采用的结晶粒度试验方法必须关注实际需要。材料试验室必须开展补充试验,并述及未来生产工艺和制定标准。本文给出了一份影响结晶粒度因素的报告,对结晶粒对零部件承载能力的影响做出解释,并论述了金属外层和内核之间的差异。