Title

Differential Ionization of Ar by Positron and Electron Impact

Abstract

Coincidences between recoil ions-ejected electrons, and recoil ions-scattered projectiles were used to study the kinematics of electron and positron impact ionization. Differential studies, recently performed at the University of Missouri-Rolla, for 500 eV electron and positron impact on Ar are presented. The positron and electron beams are produced by means of a 22Na source and an electron gun respectively. The target is a simple gas jet. An electrostatic energy analyzer and a position sensitive detector measure the post-collision projectile energies and scattering angles. A channeltron counts recoil ions which are extracted by means of an electric field. In the opposite direction, a channelplate detector records low energy electrons emerging from the collision volume.

Department(s)

Physics

Sponsor(s)

National Science Foundation (U.S.)

Keywords and Phrases

Electron; Positron

Library of Congress Subject Headings

Collisions (Nuclear physics)
Ionization

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Elsevier, All rights reserved.

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