An investigation was performed about the ion implantation of radioactive nuclei into Te single crystals. Although ${}_{}{}^{125m}{}_{}{}^{}\mathrm{Te}$ was implanted to a relatively high dose, the Mössbauer spectra of these sources indicate a substitutional implantation and a maintainance of the single-crystal lattice. Using ${}_{}{}^{129m}{}_{}{}^{}\mathrm{Te}$ sources in a polycrystalline Te lattice and a CuI absorber, $e^{2}qQ=-404\mathrm{}\pm 4$ MHz, $\eta =0.73\mathrm{}\pm 0.02$, and $\delta =-1.19\mathrm{}\pm 0.04$ mm/sec were measured. Using ${}_{}{}^{129m}{}_{}{}^{}\mathrm{Te}$ sources implanted in a Te single crystal, the angle between the crystal $c$ axis and the $z$ axis of the electric field gradient was measured to be less than 15°. In all these experiments no definite evidence for the Goldanskii-Karyagin effect in the Te lattice was found.

• Received 10 August 1973

DOI:https://doi.org/10.1103/PhysRevB.9.848