The lattice site occupation of Li in CdTe at temperatures between 40 a
nd 500 K was investigated with the emission channeling method. Radioac
tive Li-8 ions were implanted at low doses into CdTe single crystals.
Emission channeling patterns of alpha-particles emitted in the nuclear
decay of Li-8 (t(1/2) = 838 ms) were measured and compared to calcula
ted emission channeling and blocking effects. At temperatures below 13
0 K the Li ions occupy mainly tetrahedral interstitial sites and about
10% substitutional sites. In the temperature range between 130 and 19
0 K, a site change from the tetrahedral interstitial sites to substitu
tional sites is observed. Between 190 and 470 K, in addition to the su
bstitutional Li, all samples show Li at sites, which are displaced 0.7
(1) Angstrom from the substitutional position, either along the [111]
axis or [100] axis. Above 470 K out-diffusion of Li to the surface is
observed.