The chemical consequences of carbon and nitrogen implantation into LiH were studied. "C and I3N atoms were injected by nuclear recoil implantation following the processes I4N(p, a)"C and I60(p, a)13N in BN/LiH and AI,O,/LiH powder mixtures with 13 MeV protons. The chemical products of the shortlived radiostopes "C and 13N were studied by radiochromatography (GC, HPLC). Main products were "CH, (65%) and 13NH3 (35%) together with I3NH (or I3NH,) radicals (65%). In a second attempt, 250 keV I2C+ and I4N+ ions from an accelerator were implanted into LiH single crystalline plates at 6 K. The analysis was performed in situ by optical absorption spectroscopy in the visible and infrared spectral region. The formation of C-H and N-H bonds at low temperatures was confirmed. Carbon implants are more able than those of nitrogen to build up complete reaction products such as CH,.
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