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Activation energy for thermal desorption of dysprosium from a tungsten microcrystal of about 300nm diameter was determined by means of the field-emission method. The desorption was detected from the whole W emitter surface in the temperature range 1490–1665K for dysprosium average coverage θ<0.06 monolayer. The average activation energy was determined to be 4.09±0.06eV/atom and the frequency factor...
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