Cesium with residual oxygen on a cylindrical tungsten polycrystal

The chemical states and changes in the work function of a heterogeneous multilevel film have been determined during the adsorption of cesium at 295 K on a cylindrical gas-phase polycrystalline tungsten coating (30 $\mu$m) of Nb–1%Zr alloy with a minimum concentration of residual oxygen using low-energy threshold electron spectroscopy and contact potential difference methods. The chemical states and the change in the work function of this film have been found during successive heating up to 1875 K.