Energy Dependence of the (e,2e) Recoil Peak to Binary Peak Ratio Across He (2p²)¹D and (2s2p)¹P Autoionizing Levels

Authors

B. A. deHarak, Illinois Wesleyan University
K. Bartschat, Drake University
Nicholas L. S. Martin, University of KentuckyFollow

Abstract

The (e,2e) recoil peak to binary peak ratio as a function of the ejected-electron energy is reported for helium autoionizing levels (2p²)¹D and (2s2p)¹P. A special out-of-plane geometry is used where the ejected electrons are detected in a plane that includes the momentum transfer axis but is perpendicular to the scattering plane. The measured recoil peak to binary peak ratio is a dimensionless quantity that can be directly compared with calculations. A second-order model in the projectile-target interaction correctly reproduces the observed energy dependence and magnitude of the ratio, while a first-order model does not.

Document Type

Article

Publication Date

1-9-2014

Notes/Citation Information

Published in Physical Review A: Atomic, Molecular, and Optical Physics, v. 89, article 012702, p. 1-4.

©2014 American Physical Society

The copyright holder has granted permission for posting the article here.

Digital Object Identifier (DOI)

http://dx.doi.org/10.1103/PhysRevA.89.012702

Repository Citation

deHarak, B. A.; Bartschat, K.; and Martin, Nicholas L. S., "Energy Dependence of the (e,2e) Recoil Peak to Binary Peak Ratio Across He (2p²)¹D and (2s2p)¹P Autoionizing Levels" (2014). Physics and Astronomy Faculty Publications. 131.
https://uknowledge.uky.edu/physastron_facpub/131