Cross Sections for Ionization, Capture, and Loss for 5-450-keV He⁺ on Water Vapor

Authors

• M. Eugene Rudd, University of Nebraska - LincolnFollow
• Akio Itoh, University of Nebraska - Lincoln
• T. V. Goffe, University of Nebraska - Lincoln

Document Type

Article

Date of this Version

10-1985

Comments

Published in Physical Review A Volume 32, Number 4, October 1985. Copyright © American Physical Society; used by permission.

Abstract

Cross sections for the production of positive ions and electrons and for the capture and loss of electrons by 5-450-keV He⁺ ions making collisions with water-vapor molecules have been measured. The ionization cross sections σ₊ and σ_- were measured by the transverse-field method and the electron-capture and -loss cross sections σ₁₀ and σ₁₂ by electrostatic separation of the beam components after passing through a known length of target gas. The four cross sections were adjusted to satisfy the equation σ₊ - σ_- = σ ₁₀- σ₁₂.