Topic
Photoemission spectroscopy
About: Photoemission spectroscopy is a research topic. Over the lifetime, 10821 publications have been published within this topic receiving 250888 citations. The topic is also known as: photoelectron spectroscopy & PES.
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TL;DR: The complete valence band in amorphous Si${\mathrm{O}}_{2}$ has been examined by photoelectron spectroscopy at photon energies of 21.2, 26.9, 40.8, and 1486.6 eV as mentioned in this paper.
Abstract: The complete valence band in amorphous Si${\mathrm{O}}_{2}$ has been examined by photoelectron spectroscopy at photon energies of 21.2, 26.9, 40.8, and 1486.6 eV. The spectra show emission from an 11.2-eV-wide $p$-derived valence band and from the oxygen $2s$ level at 20.2 eV below the valence-band edge. Four pieces of structure in the $p$ bands are related to the single bonding and the two nonbonding orbitals of the ${\mathrm{O}}^{\ensuremath{-}\ensuremath{-}}$ ion. A narrow, nonbonding level found at the valence-band edge may cause lattice trapping of valence-band holes.
189 citations
TL;DR: In this paper, the adsorption of atomic hydrogen on silicon (2 × 1 cleaved, (111) 7 × 7, and (100) 2 × 1 surfaces has been studied by using electron energy loss spectrscopy (ELS) and photoemission spectroscopy (UPS).
189 citations
TL;DR: A detailed description of the methods available for a derivation of a band structure from angle resolved photoemission spectra is given using copper as an example in this article, where data from various sources are collected and reviewed critically in order to derive an experimental band structure for copper.
187 citations
05 Nov 1970
TL;DR: In this paper, a theory of the angular distribution of photoelectrons ejected with a given energy from diatomic molecules is presented, where the differential cross-section OO is of the form a = l+ /JP,(co»® ) where O Total is the total crosssection, B anisotropy parameter and O the angle between the polarization vector of the incident light and the direction of the photoelectron.
Abstract: A theory of the angular distribution of photoelectrons ejected with a given energy from diatomic molecules is presented. The differential cross-section OO is of the form a = ^ [l+ /JP ,(co»® )] where O Total is the total cross-section, B an anisotropy parameter and O the angle between the polarization vector of the incident light and the direction of the photoelectron. Expressions for O total and B in terms of internal transition dipole moments are obtained for transitions between individual rotational states of the molecule and ion, for either of Hund’s cases (a) or (b) . The formulae have been developed for central-field bases for the eigenstates of the electron before and after ionization. When rotational structure in the photoelectron spectrum is unresolved the angular distribution is independent of the choice of Hund’s case
187 citations
TL;DR: An imaging photoelectron photoion coincidence spectrometer at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source is presented and a few initial measurements are reported.
Abstract: An imaging photoelectron photoion coincidence spectrometer at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source is presented and a few initial measurements are reported. Monochromatic synchrotron VUV radiation ionizes the cooled or thermal gas-phase sample. Photoelectrons are velocity focused, with better than 1 meV resolution for threshold electrons, and also act as start signal for the ion time-of-flight analysis. The ions are accelerated in a relatively low, 40–80 V cm−1 field, which enables the direct measurement of rate constants in the 103–107 s−1 range. All electron and ion events are recorded in a triggerless multiple-start/multiple-stop setup, which makes it possible to carry out coincidence experiments at >100 kHz event frequencies. As examples, the threshold photoelectron spectrum of the argon dimer and the breakdown diagrams for hydrogen atom loss in room temperature methane and the chlorine atom loss in cold chlorobenzene are shown and discussed.
187 citations