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Low-work-function surfaces produced by cesium carbonate decompositionCesium carbonate (Cs2CO3) was heated to the decomposition temperature of approximately 600 C. The nonvolatile decomposition products were condensed on a nickel substrate while the carbon dioxide was removed by pumping. The deposited material is characterized by an effective work function of between 1.05 and 1.15 eV at 450 K and by photoemission in the visible and near-infrared region of the spectrum. It is suggested that the deposited material consists of Cs2O, possibly Cs2O2, and adsorbed cesium. Silver, evaporated from a heated silver bead, produced the typical photoemissive and thermionic properties of a silver-oxygen-cesium (S-1) photocathode. The material may be of interest for thermionic energy converters and for the formation of silver-oxygen-cesium photocathodes.
Document ID
19770062449
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Briere, T. R.
(Thermo Electron Corp. Waltham, MA, United States)
Sommer, A. H.
(Thermo Electron Corp. Waltham, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1977
Publication Information
Publication: Journal of Applied Physics
Volume: 48
Subject Category
Solid-State Physics
Accession Number
77A45301
Funding Number(s)
CONTRACT_GRANT: NAS3-20302
Distribution Limits
Public
Copyright
Other

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