No abstract

No abstract

No abstract

No abstract

Homogeneous carbon-deuterium (C−D) films with a high [D]/[C] ratio, redeposited on deuteriumplasma 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−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−D−T isotopes on the accumulation and desorption of hydrogen are considered.