Radiation-Induced Conductivity in Amorphous Carbon

Citation

Jones, Todd Jarrott (1989) Radiation-Induced Conductivity in Amorphous Carbon. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/5A5K-T270. https://resolver.caltech.edu/CaltechETD:etd-02022007-131335

Abstract

Amorphous carbon films were irradiated with high energy chlorine ions with energies between 1 and 45 MeV. The electrical conductivity was measured in situ over a range of doses from 2 x 10¹⁰ to 5 x 10¹⁵ ions/cm². It was found that the conductivity increases over three to four orders of magnitude. The variation of the conductivity with temperature is successfully fitted by a Mott hopping conduction model. The energy sensitivity of the effect (excitation curve) does not parallel the electronic stopping power of chlorine in carbon, but a multihit δ electron theory based on an ion-track model closely matches the excitation curve. The 1 and 2 MeV irradiations show he effect of nuclear stopping associated with low energy irradiatio

Thesis Files