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The energy spectra of uranium atoms sputtered from uranium metal and uranium dioxide targets


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. doi:10.7907/HH37-KG57.


The energy spectra of 235U atoms sputtered from a 93% enriched 235U metal foil and a hot pressed 235U02 pellet by an 80 keV 40Ar+ 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 235U. The design and construction of this spectrometer are discussed in detail, and its operation is mathematically analyzed.

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 235U metal target was found to be well described by the functional form E(E+Eb)-2.77, where Eb = 5.4 eV. The 235U02 target produced a spectrum that peaked at a lower energy (~ 2 eV) and decreased somewhat more rapidly for E ≳ 100 eV.

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:
  • Unknown, Unknown
Defense Date:6 March 1978
Non-Caltech Author Email:robert.a.weller (AT)
Record Number:CaltechTHESIS:08222014-130727011
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8639
Deposited By: Benjamin Perez
Deposited On:22 Aug 2014 20:48
Last Modified:09 Nov 2022 19:20

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