Title

Importance of Thomas Single-Electron Transfer in Fast p-He Collisions

Abstract

We report experimental angular differential cross sections for nonradiative single-electron capture in p-He collisions (p+ He → H + He+) with a separate peak at the 0.47 mrad Thomas scattering angle for energies in the 1.3-12.5 MeV range. We find that the intensity of this peak scales with the projectile velocity as vP-11. This constitutes the first experimental test of the prediction from 1927 by L. H. Thomas [Proc. R. Soc. 114, 561 (1927)]. At our highest energy, the peak at the Thomas angle contributes with 13.5% to the total integrated nonradiative single-electron capture cross section.

Department(s)

Physics

Keywords and Phrases

Differential Cross Section; Experimental Test; Non-radiative; Projectile Velocity; Scattering Angles; Single Electron Capture; Single Electron Transfer; Electron Transport Properties

International Standard Serial Number (ISSN)

1050-2947

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 American Physical Society (APS), All rights reserved.

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