Results of a preliminary investigation of cadmium telluride (CdTe) single-crystal gamma-spectra for crystals grown by vapour-phase deposition method of chemical transport reaction with NH4X (X = Cl, Br, I) as transferors by means of gamma- and neutron-activation analysis methods are presented. Conditions and techniques of activation experiments as well as criteria of analytical gamma-line choice for identification of chemical elements in the compounds are discussed in detail. Preliminary data from gamma-activation analysis (E-gamma = 12 MeV) of CdTe single crystal stoichiometry are obtained. (C) 2002 Elsevier Science B.V. All rights reserved.