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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Inelastic Scattering of H Atoms from Surfaces
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Inelastic Scattering of H Atoms from Surfaces

机译：H原子从表面的非弹性散射

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摘要

We have developed an instrument that uses photolysis of hydrogen halides to produce nearly monoenergetic hydrogen atom beams and Rydberg atom tagging to obtain accurate angle-resolved time-of-flight distributions of atoms scattered from surfaces. The surfaces are prepared under strict ultrahigh vacuum conditions. Data from these experiments can provide excellent benchmarks for theory, from which it is possible to obtain an atomic scale understanding of the underlying dynamical processes governing H atom adsorption. In this way, the mechanism of adsorption on metals is revealed, showing a penetration-resurfacing mechanism that relies on electronic excitation of the metal by the H atom to succeed. Contrasting this, when H atoms collide at graphene surfaces, the dynamics of bond formation involving at least four carbon atoms govern adsorption. Future perspectives of H atom scattering from surfaces are also outlined.
机译：我们开发了一种仪器，利用卤化氢的光解产生几乎单能的氢原子束，并通过里德堡原子标记获得从表面散射原子的精确角度分辨飞行时间分布。这些表面是在严格的超高真空条件下制备的。这些实验的数据可以为理论提供很好的基准，从中可以获得原子尺度上对控制H原子吸附的基本动力学过程的理解。通过这种方式，金属上的吸附机制被揭示出来，显示出一种依赖于H原子对金属的电子激发才能成功实现的穿透-再表面机制。与此相反，当H原子在石墨烯表面碰撞时，至少涉及四个碳原子的键形成动力学控制吸附。还概述了H原子从表面散射的未来前景。

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