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Deep centres of the ZnS: C1 single crystals are investigated by the method of impurity electroabsorption (IEA) and photoconductivity (PhC). I n accordance with estimations fulfilled a number of the levels obtained are ascribed to Vin; (VznCls)' and Vin and also t o (VznGazn)', whose energy levels are obtained in a previous paper. In the induced IEA spectrum two fixed peaks are found whose satellite displacements A are described by different dependences on the modulating voltage U, namely A -U1/3 and -U W . This is apparently caused by the nature of centres responsible for the observed structures in the IEA spectra.B pa6o~e HCCJXeAyIOTCH rnyboKEIey pOBHX B MOHOKpMCTaJIJIaX ZnS: c1 MeTOAaMH IIpEIMeCHOrO 3JIeKTpOIIOrJlOIUeHHFi (n3n) EI @OTOIIpOBOAUMOCTH (Qn). no PeayJIb-TaTaM H3MePeHFln OIIpeneJleH 3HepreTMqeCKHfi CneKTp rny60mx ypofjaefi. COrJlaC-HO IIpOBeneHHbIM OUeHKaM, pfin IIOJlyWHHhIX YpOBHefi npMnHCaH Vzn; (VznCls)' EI viu, a TaKWe (VznGazn)', 3HepreTWfeCHH8 YpOBeHb KOTOpOrO nOJlyseH B IIpeAbIny-Uefi pa6ol.e. B CneKTpe IIHLfYUApOBaHHOrO n3n 0 6~a p y w e~b 1 ABa HeIIOABHHWbIX IIEIKB, CMeweHHFi CaTeJIJIHTOB KOTOPbIX A OIIHCbIBaIOTCFi pa3HbIMH 3aBBEICHMOCTIIMA 06yCJXOBJXeHO IIpHpOLfOfi qeHTPOB, OTBeTCTBeHBbIX 38 Ha6~1KmaeMbIe OCO6eHHOCTH OT MoRynHpyIowero Hanpmmmsr, a xiMeHHo A -Ull3 EI -U213, TO, IIO-BK~WOMY, B cnempax n3n.