Electrons with high angular momentum are the last to emerge from a solid Photoemission spectroscopy, where the absorption of an energetic photon by a material results in the emission of an electron, is an invaluable source of information about electronic structure. Electrons gain their kinetic energies by interacting with both light and their surroundings. In a solid, for example, this makes it possible to measure band energies, energies and lifetimes of quasiparticles, spectral density of states, surface states, and both elastic and inelastic scattering processes. Since the photoelectric effect was explained by Max Planck and Albert Einstein, the fundamental processes behind photoemission have been thoroughly studied in both experiment and theory, but do we fully understand the dynamics of electron emission? On page 1274 of this issue, Siek et al. (1) show that the angular momentum of the electron affects which electrons are emitted first from an atom in a solid.

中文翻译：

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角动量可以减慢光发射

具有高角动量的电子是最后从固体光电发射光谱中出现的电子，其中材料吸收高能光子导致电子发射，是有关电子结构的宝贵信息来源。电子通过与光及其周围环境相互作用来获得它们的动能。例如，在固体中，这使得测量能带能量、准粒子的能量和寿命、状态谱密度、表面状态以及弹性和非弹性散射过程成为可能。自从马克斯·普朗克和阿尔伯特·爱因斯坦解释了光电效应后，光发射背后的基本过程在实验和理论中都得到了深入的研究，但我们是否完全了解电子发射的动力学？在本期第 1274 页，Siek 等人。