The energy spectra of uranium atoms sputtered from uranium metal and uranium dioxide targets
Data(s) |
1978
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Resumo |
<p>The energy spectra of <sup>235</sup>U atoms sputtered from a 93% enriched <sup>235</sup>U metal foil and a hot pressed <sup>235</sup>U0<sub>2</sub> pellet by an 80 keV <sup>40</sup>Ar<sup>+</sup> beam have been measured in the range 1 eV to 1 keV. The measurements were made using a mechanical time-of-flight spectrometer in conjunction with the fission track technique for detecting <sup>235</sup>U. The design and construction of this spectrometer are discussed in detail, and its operation is mathematically analyzed.</p> <p>The results of the experiment are discussed in the context of the random collision cascade model of sputtering. The spectrum obtained by the sputtering of the <sup>235</sup>U metal target was found to be well described by the functional form E(E+E<sub>b</sub>)<sup>-2.77</sup>, where E<sub>b</sub> = 5.4 eV. The <sup>235</sup>U0<sub>2</sub> target produced a spectrum that peaked at a lower energy (~ 2 eV) and decreased somewhat more rapidly for E ≳ 100 eV.</p> |
Formato |
application/pdf |
Identificador |
http://thesis.library.caltech.edu/8639/1/Weller_ra_1978.pdf Weller, Robert Allen, Jr. (1978) The energy spectra of uranium atoms sputtered from uranium metal and uranium dioxide targets. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:08222014-130727011 <http://resolver.caltech.edu/CaltechTHESIS:08222014-130727011> |
Relação |
http://resolver.caltech.edu/CaltechTHESIS:08222014-130727011 http://thesis.library.caltech.edu/8639/ |
Tipo |
Thesis NonPeerReviewed |