[en] The γ-radiolysis of hydrogen sulphide in the presence of butadiene and carbon tetrachloride was studied. Addition of butadiene causes the slow diminishing in G(H₂) and sharp lowering in G(S) from 7.1 for pure H₂S down to 0.8 at all the used concentrations of butadiene. When carbon tetrachloride is added to hydrogen sulphide, G(H₂) is not changed but G(S) increases by ΔG(S)approximately2. The presence of butadiene and carbon tetrachloride together causes the same change in G(H₂) as in the case of butadiene alone and lowers G(S) to zero. The ionic mechanism of molecular sulphur formation is proposed, consistent with the observed experimental facts. (author)