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Title: Adsorption states of protium and deuterium in redeposited polymer hydrocarbon films from a T-10 tokamak
Authors: Svechnikov, N.Y.
Stankevich, V.G.
Sukhanov, L.P.
Men'shikov, K.A.
Lebedev, A.M.
Kolbasov, B.N.
Zubavichus, Y.V.
Rajarathnam, D. 
Issue Date: Apr-2009
Citation: Svechnikov, N.Y., Stankevich, V.G., Sukhanov, L.P., Men'shikov, K.A., Lebedev, A.M., Kolbasov, B.N., Zubavichus, Y.V., Rajarathnam, D. (2009-04). Adsorption states of protium and deuterium in redeposited polymer hydrocarbon films from a T-10 tokamak. Journal of Surface Investigation 3 (3) : 420-428. ScholarBank@NUS Repository.
Abstract: Free redeposited hydrocarbon films (flakes) with a high content of deuterium and hydrogen formed in the T-10 tokamak operating at the Russian Research Centre (RRC) "Kurchatov Institute" are studied using thermal desorption spectroscopy (TDS), infrared (IR) spectroscopy, and X-ray diffraction (XRD) analysis. According to the XRD data, the films contain scattering elements with dimensions of about 1 nm and weakly ordered structures. The TDS curves for D2 (H2) consisting of two groups of peaks at 450-800 and 900-1000 K turn out to be sufficiently similar to the spectra of nanographite obtained by milling graphite mechanically. Two main adsorption states with activation energies of ≈0.65 and ≈1.25 eV/N corresponding to hopping diffusion and resonance mechanisms, respectively, were discovered. The difference between the IR spectra of reddish-gold and dark-brown films is due to both a weaker degree of C-H hybridization of dark films and their disordered carbon network whose ends are connected to CD2,3 fragments. © Pleiades Publishing, Ltd., 2009.
Source Title: Journal of Surface Investigation
ISSN: 10274510
DOI: 10.1134/S102745100903015X
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