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Thc mechanisms of interaction of nonequilibrium phonons with electron donor states localized on Cozi impurities in monocrystals of CdTe are investigated by the heat pulse technique. There is no impurity scattering for phonons of longitudinal mode propagating along one of the fourth-order axcs 9 1, [ 1001, where I-phonons are nonpiezoactive. Therefore, the piezoelectric mechanism of electron phonon interaction predominates over all other scattering mechanisms. M C'TOAOM TeIInOBbIX HMIIyJIbCOB H3YYeHbI MeXaHH3Mbl B3akiMOAeIkTBMR HepaBHOBKHbIX (POHOHOB C XlCKTPOHHblMH AOHOPHblMM COCTORHHRMH ~OK~~H30BaHHbIMH Ha npHMeCRX c02 B MOHOKTPHCTaJl-JIaX CdTe. ,&Is (POHOHOB IlpOAOJIbHOk MOAbI, pa3IIpOcTpaHRIoI4HXCR BAOJIb OnHOk H 3 OCe6 YeTBepTOrO flOp%TKa 4 11 [ 1001, B KOTOPOM I-@OHOHbI HeIIbe30aKTHBHb1, IIpHMeCHOe PaCCeRHcle IIpaKTHqeCKM OlCYTCTRYeT. CJIenOBaTeJIbHO, nbe303JIeKTpHYeCKHk MeXaHH3M 3JIeKTpOH-@OHOHHOrO B3aHMO-ilCfiCTBMR RBJIReTCR AOMMHMpYIoUIHM Han BCeMM APYTMMH MeXaHM3MaMH.