Laboratory experiments were performed on the sorption of cesium on gamma-irradiated silica-titania gel. The detrimental effects
of absorbed dose on the affinity of the sorbent towards cesium was discussed. Data obtained from sorption studies were fit
into heterogeneity based Freundlich isotherm. The empirical parameters, thus obtained were used to arrive at the site distribution
function. The potential of site distribution function in foreseeing, the reusability and long-term residence of radionuclides
in the sorbent has been highlighted.