Harding Dan J, Neugebohren J, Auerbach Daniel J, Kitsopoulos T N, Wodtke Alec M
Institute for Physical Chemistry, Georg-August University of Göttingen , 37077 Göttingen, Germany.
Max Planck Institute for Biophysical Chemistry , 37077 Göttingen, Germany.
J Phys Chem A. 2015 Dec 17;119(50):12255-62. doi: 10.1021/acs.jpca.5b06272. Epub 2015 Oct 6.
We present a new implementation of ion imaging for the study of surface scattering processes. The technique uses a combination of spatial ion imaging with laser slicing and delayed pulsed extraction. The scattering velocities of interest are parallel to the imaging plane, allowing speed and angular distributions to be extracted from a single image. The first results of direct scattering of N2 from a clean, single-crystal Au(111) surface are reported, and the speed resolution is shown to be competitive with current state-of-the-art time-of-flight methods for velocity measurements while providing simultaneous measurements of in-plane angular distributions.
我们展示了一种用于研究表面散射过程的离子成像新方法。该技术结合了空间离子成像、激光切片和延迟脉冲提取。感兴趣的散射速度与成像平面平行，从而能够从单个图像中提取速度和角度分布。报道了N2从清洁的单晶Au(111)表面直接散射的首批结果，结果表明速度分辨率与当前用于速度测量的最先进飞行时间方法相当，同时还能提供面内角度分布的同步测量。
