Abstract
Implantation and trapping effects of helium and neon are studied by thermal desorption spectrometry (TDS) in single-crystalline Ti 1C 0.924, which has a structural defect concentration on the order of percents on the carbon sublattice. For neon a first-order surface-related release peak and a very broad diffusional bulk-related release peak are found. For helium only the bulk peak has significant magnitude. The bulk diffusion mechanism can be explained by either a hopping or a vacancy assisted mechanism. In addition, neon is capable of displacing titanium atoms, and hence of creating vacancy clusters which have a stronger binding energy for neon than the structural defects; this is clearly visible in the spectra.
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Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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