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Erosion of frozen sulfur dioxide by ion bombardment: Applications to Io

Melcher, C. L. and Lepoire, D. J. and Cooper, B. H. and Tombrello, T. A. (1982) Erosion of frozen sulfur dioxide by ion bombardment: Applications to Io. Geophysical Research Letters, 9 (10). pp. 1151-1154. ISSN 0094-8276. http://resolver.caltech.edu/CaltechAUTHORS:20141110-130958571

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Abstract

The erosion of frozen SO_2 due to bombardment by both light and heavy ions (He and F) was measured for bombarding energies of 0.08 to 1.3 MeV/amu. The number of SO_2 molecules ejected from the target per incident ion (i.e., the sputtering yield) was 50 for 1.5 MeV He ions and 7300 for 6 MeV F ions. Ion bombardment followed by heating produced an oxygen/sulfur residue which was much more stable against subsequent ion bombardment than the initial frozen SO_2. The erosion rate of SO_2 frost on Jupiter's moon Io depends strongly on the elemental composition and energy spectra of the magnetospheric ion flux which bombards the surface. The combined effects of ion bombardment and heating which produced residues on our target substrates may also occur on Io from magnetospheric ion bombardment and heating by volcanism. Our experimental results compare favorably with a new model of the sputtering process which considers the energy loss of the incident ion to electronic excitation in the target.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/GL009i010p01151DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/GL009i010p01151/abstractPublisherArticle
Additional Information:Copyright 1982 by the American Geophysical Union. (Received April 29, 1982; accepted August 24, 1982.) Paper number 2L1328. We are grateful for discussions with P. K. Haff and C. C. Watson. This work was supported in part by NASA [NAGW-148, NAGW-202] and the NSF [PHY79-23638, CHE81-13273].
Funders:
Funding AgencyGrant Number
NASANAGW-148
NASANAGW-202
NSFPHY79-23638
NSFCHE81-13273
Record Number:CaltechAUTHORS:20141110-130958571
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141110-130958571
Official Citation:(1982), Erosion of frozen sulfur dioxide by ion bombardment: Applications to Io. Geophysical Research Letters, 9: 1151–1154. doi: 10.1029/GL009i010p01151
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51518
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:10 Nov 2014 21:48
Last Modified:10 Nov 2014 21:48

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