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Effect of Cesium Vapor on the Emission Characteristics of Uranium Carbide at Elevated Pressures

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1 Author(s)
Kidd, Philip W. ; Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico

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The saturated emission currents from uranium carbide in cesium vapor were measured for four different bath temperatures T: 167°, 197°, 227°, and 250°C (the cesium arival rates μa, in 1019 atoms/cm2, were 0.3, 1, 3, and 6, respectively). The measurements were made with a ``plasma anode'' tube at constant temperature. The plot of logμa vs 1000/T was used to extrapolate the electron emission ``S'' curves to arrival rates that differed by a factor of ten. Since calculations based on the assumption of a homogeneous surface yields unexpectedly high binding energies and surface coverages, it seems likely that some surface patchiness exists.

Published in:

Journal of Applied Physics  (Volume:36 ,  Issue: 1 )