Actions for ULTRAHIGH VACUUM TECHNIQUES. Quarterly Progress Report, October 1- December 31, 1962. Research Report 62-828-441-R2.

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ULTRAHIGH VACUUM TECHNIQUES. Quarterly Progress Report, October 1- December 31, 1962. Research Report 62-828-441-R2.

Published
United States : [publisher not identified], 1962.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1962.
Physical Description
microfiche : negative ; 8 x 13 cm

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Summary
Mass spectrometer monitoring of peaks upon flashing the target in measurement of CO photodesorption from W indicates bulk heating to be a main contribution to desorption. Study of auger electron ejection from absorption of O on W yields good agreement between calculated and measured vaiues for electron ejection. Values for O adsorption on W are compared with other determinations, and wide variations in sticking probabilities are noted. Measurements of the conversion of O incident on W ribbons to WO/sub 3/ are found to differ considerably from other determinations. Efforts to eliminate spurious effects in the studies are discussed, and the probability of Auger electron emission is determined not to exceed 1.3 x 10/sup -9/ electrons per molecule absorbed, 10/sup 5/ less than earlier estimates. Difficulties in obtaining clearly defined flash filament adsorption data for CO on W permit only determination of an upper limtt of 10/sup -8/ electrons per molecule adsorbed for the maximum efficiency. Studies of inelastic electron collisions with N/sub 2/, H/sub 2/, CO, H/sub 2/O, and CO/sub 2/ gases on W surfaces reveal inelastic and superelastic peaks for water vapor, only an inelastic peak for H, and unexpected absence of inelastic peaks in N/sub 2/ and CO. (D.C.W.)
Report Numbers
NYO-9813
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: AT(30-1)-2823
NSA number: NSA-17-012761
OSTI Identifier 4757298
Research organization: Westinghouse Electric Corp. Research Labs., Pittsburgh.
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