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Radiation-induced conductivity in amorphous carbon


Jones, Todd J. (1989) Radiation-induced conductivity in amorphous carbon. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/5A5K-T270.


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 10(10) to 5 x 10(15) 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 [delta] 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

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Applied Physics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Applied Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Tombrello, Thomas A.
Thesis Committee:
  • Unknown, Unknown
Defense Date:5 April 1989
Record Number:CaltechETD:etd-02022007-131335
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:466
Deposited By: Imported from ETD-db
Deposited On:20 Feb 2007
Last Modified:21 Dec 2019 01:49

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PDF (Jones_tj_1989.pdf) - Final Version
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