Adsorption of Oxygen on Tungsten

The adsorption of oxygen on a single crystal tungsten ribbon at room temperature was studied. The maximum coverage was found to be 12.3×1014 atoms cm-2 and the initial sticking probability is 0.24 approximately. The rate of formation of tungsten oxide at the surface of the hot filament was also studied. These results and earlier ones bearing on the adsorption of nitrogen on tungsten are discussed in the light of an idealized atomic model for the tungsten surface.