Measurements of transversal relaxation times in the two-pulse Electron Spin Echo method. of radicals trapped in α- and γ-irradiated frozen solution of H2SO4and in methyl alcohol yields information on spatial distribution of trapped radicals. The results testify to the essential influence of the LET of radiation on the nature of spatial radical distribution and can be explained on the basis of the spur-and-track model. Average distances between radicals in tracks and spurs, and the number of radicals in spurs were calculated from relaxation data.