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Sputtering of uranium tetrafluoride in the electronic stopping region

Griffith, J. E. and Weller, R. A. and Seiberling, L. E. and Tombrello, T. A. (1980) Sputtering of uranium tetrafluoride in the electronic stopping region. Radiation Effects, 51 (3-4). pp. 223-232. ISSN 0033-7579. doi:10.1080/00337578008210004.

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We have studied the sputtering of ^(235)U from UF_4 surfaces by ions with energies in the electronic stopping region. The observed sputtering yields are very large and are associated with the electronic stopping power. Measured yields produced by ^(19)F ions at energies ranging from 1/16 MeV/amu to 1½ Mev/amu exhibit a peak of S = 7.1 ± 1.5 for ^(19)F^(+3) at an energy of ¼ MeV/amu. The data suggest that the yield depends on the charge state of the incident ion. The yields are independent of target temperature in the range between 70°C and 170°C. The energy spectrum of the neutral component of the sputtered particles produced by ¼ MeV/amu ^(19)F^(+2) has been measured with the mechanical time-of-flight spectrometer developed by Weller and Tombrello. The spectrometer data indicate that a large fraction of the sputtered particles is charged. We also describe the behavior of high energy sputtering of UF_4 by ^(4)He, ^(16)O and ^(20)Ne. Experiments with ^(16)O and ^(20)Ne beams at 100 keV show that the Sigmund theory adequately describes the sputtering of UF_4 in the nuclear stopping region.

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Additional Information:© 1980 Gordon and Breach Science Publishers, Inc. Received March 4, 1980. The authors wish to thank D. S. Burnett, J. W. Mayer and J. M. Poate for many useful suggestions.
Funding AgencyGrant Number
NASANGR 05-002-333
Department of Energy (DOE)EX-76-G-03-1305
Issue or Number:3-4
Record Number:CaltechAUTHORS:20141103-160135719
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Official Citation:Griffith, J. E., Weller, R. A., Seiberling, L. E., & Tombrello, T. A. (1980). Sputtering of uranium tetrafluoride in the electronic stopping region. Radiation Effects, 51(3-4), 223-231. doi: 10.1080/00337578008210004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51207
Deposited On:04 Nov 2014 18:02
Last Modified:10 Nov 2021 19:07

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