The influence of gamma-irradiation on the paramagnetic properties of n
on-doped polyacetylene at low and high radiation doses has been studie
d and summarized. The dependence of the EPR spectra on the radiation d
ose in irradiated polyacetylene has been measured. No essential change
s of the spin mobility as a consequence of irradiation were observed.
our measurements of spin concentration confirm the high resistivity of
non-doped polyacetylene to radiation.