Re-emission of deuterium implanted in carbon by laser desorption

Laser desorption experiments were performed on deuterium implanted carbon. Ion energies ranged from 0.5 up to 6.0 keV and fluences from 0.6 × 10 20 to 16 × 10 20 m −2. The desorption results were compared to computer simulations using the DTRLAS code. Analysis indicated that the desorption process i...

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Bibliographic Details
Published in:Journal of nuclear materials 1996-07, Vol.231 (1), p.47-54
Main Authors: Kéroack, D., Terreault, B.
Format: Article
Language:English
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Summary:Laser desorption experiments were performed on deuterium implanted carbon. Ion energies ranged from 0.5 up to 6.0 keV and fluences from 0.6 × 10 20 to 16 × 10 20 m −2. The desorption results were compared to computer simulations using the DTRLAS code. Analysis indicated that the desorption process implies a second order detrapping and a diffusion limited transport. The best fitting parameters give a detrapping rate vV of (4 ± 1) × 10 −21 exp(−(0.36 ± 0.02) eV/molecule/ kT) m 3/s and an effective diffusion coefficient D = (2.0 ± 0.5) × 10 −7 exp(−(0.20 ± 0.02) eV/ kT) m 2/s. The amount of H 2 and HD released simultaneously with D 2 as well as the deuterated hydrocarbons were also measured. Indirect evidence for atomic D release at high temperature was found.
ISSN:0022-3115
1873-4820
DOI:10.1016/0022-3115(96)00360-1