Amorphous hydrogeneted carbon films were prepared by plasma assisted cvd metnod and their dc conductivity as studied as a function of temperature in the range of 300K to 10K. Films were then subjected to high energy(170MeV)$I^{+13}$ ion irradiation. After irradiation an marked change was observed in the conductivity and its temperature dependenc. The conductivity decreased by 2 to 3 orders of magnitude, room temperature activation energy increased and a gap appeared in the electronic structure. Photo-emission spectropic study on the material show a decrease in the $pi$ states of the electronic density of states spectrum from UPS and a noticible change in the Cls peak shape in XPS.