Cross Sections for Ionization of Gases by 10-2000-keV He⁺ Ions and for Electron Capture and Loss by 5-350-keV He⁺ Ions

Authors

• M. Eugene Rudd, University of Nebraska - LincolnFollow
• T. V. Goff, University of Nebraska - Lincoln
• A. Itoh, University of Nebraska - Lincoln
• R. D. DuBois, Pacific Northwest Laboratory, Battelle Memorial Institute, Richland, Washington

Document Type

Article

Date of this Version

8-1985

Comments

Published in Physical Review A Volume 32, Number 2, August 1985. Copyright © American Physical Society; used by permission.

Abstract

Cross sections for production of positive and negative charge for 10-2000-keV He⁺ ions on He, Ne, Ar, Kr, H₂, N₂, CO, O₂, CH₄, and CO₂ were measured by the transverse-field method. Electron-capture and -loss cross sections for 5-350-keV He⁺ ions on the same targets were measured by the method of beam deflection of various charge states after passing through a known length of target gas. Secondary-emission detectors were used to detect neutral, singly charged, and doubly charged beam components. The equation σ₊- σ_- = σ₁₀- σ₁₂ relating the four measured cross sections was utilized to make a least-squares adjustment of the data.