Infrared (IR) transmission spectra of ion implanted polymers are evalu
ated as a function of the implantation fluence. From the IR line assig
nment, clues for the radiochemical processes are derived. For low dose
irradiated samples the transmission grows linearly with fluence, but
comes to saturation with increasing dose. For PMMA the relations of tr
ansmission vz. fluence for different ions scale with the nuclear energ
y transfer.