Abstract

The mass balance equations and the rate constants of elementary processes related to retention and re-emission of hydrogen isotopes have been described for evaluation of their transient recycling fluxes from targets irradiated simultaneously with H + and D +. The D/H ratios of the concentrations of H and D retained at steady state calculated under three different conditions are compared with the experimental values for graphite and beryllium measured by means of the elastic recoil detection technique. The retention and re-emission processes of hydrogen isotopes in graphite and beryllium are discussed.

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