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Sputtering of uraniumResults are presented for an experimental study of the sputtering of U-235 atoms from foil targets by hydrogen, helium, and argon ions, which was performed by observing tracks produced in mica by fission fragments following thermal-neutron-induced fission. The technique used allowed measurements of uranium sputtering yields of less than 0.0001 atom/ion as well as yields involving the removal of less than 0.01 monolayer of the uranium target surface. The results reported include measurements of the sputtering yields for 40-120-keV protons, 40-120-keV He-4(+) ions, and 40- and 80-keV Ar-40(+) ions, the mass distribution of chunks emitted during sputtering by the protons and 80-keV Ar-40(+) ions, the total chunk yield during He-4(+) sputtering, and some limited data on molecular sputtering by H2(+) and H3(+). The angular distribution of the sputtered uranium is discussed, and the yields obtained are compared with the predictions of collision cascade theory.
Document ID
19780068512
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gregg, R.
(California Inst. of Tech. Pasadena, CA, United States)
Tombrello, T. A.
(California Institute of Technology Pasadena, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Publication Information
Publication: Radiation Effects
Volume: 35
Subject Category
Nuclear And High-Energy Physics
Accession Number
78A52421
Funding Number(s)
CONTRACT_GRANT: NSF PHY-76-83685
CONTRACT_GRANT: NGR-05-002-333
CONTRACT_GRANT: EX-76-G-03-1305
Distribution Limits
Public
Copyright
Other

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