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- W2273144701 abstract "Samples were prepared by vacuum sputtering beryllium onto a steel or beryllium bronze backing with subsequent oxidation to form an oxide film several hundred angstroms thick. The oxide film was put under compressive or tensile stress with the use of a special bending jig. A beam of primary electrons (400 ev) was directed toward the center of the sample, and measurements of the secondary electron emission were carried out in a spherical condenser in a vacuum of 5 x 10/sup -7/ mm Hg. Two maxima of the electron velocity of the secondary emission were noted. The first maximum is due to true secondary electrons whose intensity was observed to decrease with increasing stress on the beryllium oxide film. The second maximum corresponds to electrons with insufficient energy. This maximum broadens out with an increase in stress. Removal of the stress ordinarily restored the sample to its original condition, but if the compressive stress exceeded 2 to 3 mm on the gage for a sample 0.5 mm thick, the distortion in the volt-ampere characteristic of the secondary emission became permanent. It is postulated that lattice defects which originate during deformation of the beryllium oxide film act as electron traps for secondarymore » electrons. (TTT)« less" @default.
- W2273144701 created "2016-06-24" @default.
- W2273144701 creator A5091528453 @default.
- W2273144701 date "1961-02-11" @default.
- W2273144701 modified "2023-09-23" @default.
- W2273144701 title "THE EFFECT OF MECHANICAL STRESSES ON THE SECONDARY ELECTRON EMISSION FROM BERYLLIUM OXIDE" @default.
- W2273144701 hasPublicationYear "1961" @default.
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