RADIOISOTOPES

A modified structure around latent tracks in polymeric etched track detectors has been examined. A series of quantitative analyses on the changes in the density of each functional group composing the polymers has provided the chemical damage parameters of the damage density. These include the number of losses of considered functional groups per unit distance of the track length, effective track core radius, in which the chemical groups are lost, and the radiation chemical yields, G values, for each group. These are evaluated as a function of the stopping power, ranging from 1 to 12,000 eV/nm. The role of multi-hits with low energy electron to form any permanent damage has been studied using Monte-Carlo simulations.