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- W1554117939 abstract "Using the thermal desorption method, we have studied the adsorption of oxygen on a polycrystalline tungsten strip. For high exposures of the tungsten in the oxygen, we observe three peaks in the thermal desorption spectra with T /SUB max/ 400, 1200, and 2200/sup 0/K. The two low-temperature peaks were observed for the first time. Filling of the tungsten surface by these low-temperature forms of oxygen comprised less than or equal to10/sup -3/ monolayers, and the activation energy for desorption was 90+/- 5 and 250 +/- 10 kJ/mole, respectively. In the temperature interval 195-295/sup 0/K, we investigated the diffusion of weakly bound oxygen (T /SUB max/ = 400/sup 0/K) on a tungsten surface occupied by more strongly bound oxygen. The temperature dependence of the diffusion coefficient is described by an Arrhenius equation with parameters D/sub 0/ = 0.5 +/- 0.2 cm/sup 2//sec, E = 22 +/- 2 kJ/mole." @default.
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- W1554117939 date "1986-10-01" @default.
- W1554117939 modified "2023-09-26" @default.
- W1554117939 title "Surface diffusion of chemisorbed oxygen on polycrystalline tungsten. II. diffusion of strongly bound oxygen" @default.
- W1554117939 hasPublicationYear "1986" @default.
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