Journal ArticleDOI
The oxidation of Cs—uv photoemission studies
TLDR
In this paper, a very narrow peak appears in the energy distribution curves (EDC) about 2.6 eV below the Fermi level Ef and grows with increasing exposure, associated with oxygen ions dissolved in the cesium metal below the surface.Abstract:
The oxidation of cesium has been studied using ultraviolet photoemission spectroscopy. Upon exposure of a fresh cesium film to oxygen, a very narrow peak appears in the energy distribution curves (EDC’s) about 2.6 eV below the Fermi level Ef and grows with increasing exposure. This peak is associated with oxygen ions dissolved in the cesium metal below the surface. After 3×10−5 Torr sec of exposure, additional structure begins to appear. This is associated with the precipitation of cesium oxides. The structure associated with the oxides changes with increasing oxygen exposure indicating the appearance of different oxides. The oxide penetrates appreciably to the surface only after strong oxide buildup has taken place beneath the surface. A sharp minimum of 0.7 eV is found in the work function over a relatively small range of oxygen exposure.read more
Citations
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Journal ArticleDOI
Photoemission studies of adsorbed oxygen and oxide layers
TL;DR: A comprehensive review about the versatility of photoelectron spectroscopy to study the especially complex interaction of oxygen with metal surfaces and the nature of the reaction products can be found in this paper.
Journal ArticleDOI
Note on the origin of intrinsic stresses in films deposited via evaporation and sputtering
TL;DR: In this paper, a broad and brief review of the question of intrinsic stresses in films deposited via evaporation and sputtering is provided, with a sufficient number of references, and some attention is paid to a third model where compressive stresses could result from impurity adsorption not at the top surface of the growing films, but one monolayer below.
Journal ArticleDOI
UPS studies of the bonding of H2, O2, CO, C2H4 and C2H2 on Fe and Cu☆
TL;DR: In this paper, a comprehensive study of the adsorption of simple molecules on three representative metals of the first row transition metals, namely, polycrystalline Fe and Cu, is presented.
Journal ArticleDOI
The interaction of cesium with oxygen
TL;DR: In this article, a deexcitation of metastable noble gas atoms (MDS) was used to follow the continuous oxidation of Cs films, which can be directly correlated with the associated change of the work function.
References
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Journal ArticleDOI
Techniques for the Measurement of Photoemission Energy Distribution Curves by the ac Method
TL;DR: In this paper, a new circuit for measuring photoemission energy distribution curves (EDC's) by the ac retarding potential method is described which offers greatly improved noise performance over earlier circuits.
Journal ArticleDOI
Comparison of the oxidation process in strontium and cerium by ultraviolet photoelectron spectroscopy
C. R. Helms,W. E. Spicer +1 more
TL;DR: The ultraviolet photoemission technique has been applied to the study of the oxidation of strontium and cerium and has been found to provide a method to determine the oxide growth rate perpendicular to the surface, the composition of the surface and the stable oxide phases formed during the oxidation process as mentioned in this paper.
Journal ArticleDOI
Photoemission Studies of the Alkali Metals. II. Rubidium and Cesium
Neville V. Smith,Galen B. Fisher +1 more
TL;DR: In this article, the photoelectric yield and photoelectron energy distributions have been measured on Rb and Cs in the photon energy range 2.0-11.2 eV.
Journal ArticleDOI
The iii-v photocathode: a major detector development
W. E. Spicer,R. L. Bell +1 more
TL;DR: In this article, the vacuum level at the surface lies below the bottom of the conduction band in the bulk of the material and the threshold of response is set by the III-V bandgap.