氦纳滴光电电子的非弹性散射。

Inelastic scattering of photoelectrons from He nanodroplets.

机构信息

Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark.

Department of Physics, Indian Institute of Technology, Madras, Chennai 600 036, India.

出版信息

J Chem Phys. 2019 Jan 28;150(4):044304. doi: 10.1063/1.5074130.

DOI:10.1063/1.5074130

PMID:30709284

Abstract

We present a detailed study of inelastic energy-loss collisions of photoelectrons emitted from He nanodroplets by tunable extreme ultraviolet (XUV) radiation. Using coincidence imaging detection of electrons and ions, we probe the lowest He droplet excited states up to the electron impact ionization threshold. We find significant signal contributions from photoelectrons emitted from free He atoms accompanying the He nanodroplet beam. Furthermore, signal contributions from photoionization and electron impact excitation/ionization occurring in pairs of nearest-neighbor atoms in the He droplets are detected. This work highlights the importance of inelastic electron scattering in the interaction of nanoparticles with XUV radiation.

摘要

我们呈现了对可调谐极紫外（XUV）辐射从氦纳米液滴中发射的光电子非弹性能量损失碰撞的详细研究。通过电子和离子的符合成像探测，我们探测了最低的氦液滴激发态，直到电子碰撞电离阈值。我们发现了来自伴随氦纳米液滴束的自由氦原子发射的光电子的显著信号贡献。此外，还探测到了在氦液滴中最近邻原子对中发生的光电离和电子碰撞激发/电离的信号贡献。这项工作强调了在纳米颗粒与 XUV 辐射相互作用中，非弹性电子散射的重要性。