Research Papers in Physics and Astronomy

 

Title

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

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.

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