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  • 1 Maria Curie-Skłodowska University Institute of Physics 20-031 Lublin (Poland)
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Temperature dependence of positronium formation probabilityP was measured for catechol, resorcinol and hydroquinone. The variations ofP with temperature and relative permittivity can be explained in the framework of spur reaction mode. It seems that the spur processes are important at the first stage of Ps formation, the final value ofP depends also on free volume availability and trapping efficiency.