Temperature and spectroscopic characteristics of homogeneous co-deposited carbon-deuterium films produced in the T-10 tokamak
Date
2006
Authors
Svechnikov, N.
Stankevich, V.
Lebedev, A.
Menshikov, K.
Kolbasov, B.
Guseva, M.
Khimchenko, L.
Dharmarajan, R.
Kostetsky, Y.Y.
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Plasma Devices and Operations, 2006; 14(2):137-157
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Homogeneous carbon-deuterium (C&sbnd; D) films with a high [D]/[C] ratio, redeposited on deuterium-plasma discharge in the T-10 tokamak, have been studied by means of thermogravimetric analysis, spectroscopy based on electron paramagnetic resonance, Fourier-transform infrared spectroscopy and photoluminescence spectroscopy. Deuterium was found to be accumulated only in the C&sbnd; D 2, 3 sp 3 vibrational modes, including 633 and 1090 cm -1 deformation modes, and 2100-2200 cm -1 stretching modes, the intensity of which slightly diminished on annealing at 450 ° C. Photoluminescence of an excitonic nature was found at 390-530 nm related to the C 2p π-π* transitions within the aromatic rings, and luminescence quenched at 450 ° C. The luminescence excitation spectra at 3-10 eV showed similarity in peak positions to the luminescence excitation spectra of thin C 60 films. Possible physical reasons explaining the effect of H&sbnd; D&sbnd; T isotopes on the accumulation and desorption of hydrogen are considered.
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Copyright 2006 Taylor & Francis