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Erosion of Ice Films by Energetic Ions


Cooper, Barbara Hope (1982) Erosion of Ice Films by Energetic Ions. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/yyye-qc47.


We measured the sputtering yields of ice films by 19F ions in the electronic stopping power energy regime. The yield was a function of the incident energy and charge state of the F beam, but did not vary for tar­get thicknesses ranging from about 30-70 x 1016H2O/cm2, or substrate tem­peratures from 10-60°K.

The energy dependence of the yield demonstrates that the sputtering mechanism is related to the electronic stopping power of the incident ion in the ice film. The detailed nature of this dependence is not understood. Predictions of thermal models and ion explosion models are compared to the experimental results.

Our F data on ice is compared to H and He sputtering of ice. We also review results from the literature where sputtering of other dielectric targets with ions in the electronic stopping power regime have been studied.

Possible connections with nuclear track formation in dielectrics and laser annealing are discussed. We also briefly mention the applications of enhanced sputtering of dielectrics; for example, in non-destructive desorption of large biomolecules and in astrophysical environments where frozen gas surf aces are bombarded by energetic ion fluxes.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Tombrello, Thomas A.
Thesis Committee:
  • Tombrello, Thomas A. (chair)
  • Frautschi, Steven C.
  • Burnett, Donald S.
  • Weinberg, William Henry
Defense Date:26 August 1981
Record Number:CaltechTHESIS:04182018-111515439
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10816
Deposited By: Tony Diaz
Deposited On:25 Apr 2018 23:54
Last Modified:16 Apr 2021 22:34

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