Doctoral Dissertations
Abstract
"Application of positive-ion energy-loss spectrometry has been extended to include experimental determination of absolute excitation cross sections of ground state helium ions. Helium ion-atom collisions were studied for impact energies ranging between 20-100 keV, in 10 keV intervals. The data were taken with an apparatus resolution between 0.6-o.8 eV FWHM. Cross sections for transitions from ground state to the second and third principal quantum levels of the ion plotted as a function of impact energy were still rapidly increasing at 100 keV. The cross sections at this energy were 1.64(± 0.28) x 10⁻¹⁸cm² for He⁺(l²s1/2) -> He⁺(n = 2) and 3.46(± 0.45) x 10⁻¹⁹cm² for He⁺(l²s1/2) -> He⁺(n = 3)"--Abstract, Page ii.
Advisor(s)
Park, John T.
Committee Member(s)
Bell, Robert John, 1934-
Dowell, Jerry T.
Nygaard, Kaare J.
Penico, Anthony J., 1923-2011
Lund, Louis H., 1919-1998
Department(s)
Physics
Degree Name
Ph. D. in Physics
Sponsor(s)
National Science Foundation (U.S.)
NDEA National Institute for Advanced Study in Teaching Disadvantaged Youth (U.S.)
Publisher
University of Missouri--Rolla
Publication Date
1970
Pagination
ix, 58 pages
Note about bibliography
Includes bibliographical references (pages 55-57).
Rights
© 1970 Donald Roy Schoonover, All rights reserved.
Document Type
Dissertation - Open Access
File Type
text
Language
English
Subject Headings
Helium ions
Electron energy loss spectroscopy
Thesis Number
T 2385
Print OCLC #
6020320
Electronic OCLC #
852793009
Link to Catalog Record
Recommended Citation
Schoonover, Donald Roy, "Absolute excitation cross sections of He⁺ in 20-100 keV He⁺-He collisions using energy-loss spectrometry" (1970). Doctoral Dissertations. 2121.
https://scholarsmine.mst.edu/doctoral_dissertations/2121
