Absolute Triply Differential (e,2e) Cross Section Measurements for H with Comparison to Theory

Authors

J. Roder, Fachbereich Physik, Universitat Kaiserslautern, Germany
H. Erhardt, Fachbereich Physik, Universitat Kaiserslautern, Germany
Cheng Pan, University of Nebraska - Lincoln
Anthony F. Starace, University of Nebraska-LincolnFollow
Igor Bray, Flinders University of South AustraliaFollow
Dmitry V. Fursa, Flinders University of South Australia

Date of this Version

9-1-1997

Comments

Published by American Physical Society. Phys. Rev. Lett. 79, 1666 (1997). http://prl.aps.org. Copyright © 1997 American Physical Society. Permission to use.

Abstract

Absolute triply differential (e,2e) cross section measurements are presented for H (for incident energies, E₀, of 15.6 and 17.6 eV) for equal energy sharing and the θ₁₂ = π configuration. Results of distorted partial wave calculations agree with the measurements; those of convergent close coupling calculations agree with the relative angular distributions, but are lower than experiment by factors of from 2 to 7. Relative experimental results for H for E₀ = 14.6 eV show a qualitative change in shape, which agrees with theory. Implications of the absolute experimental results for the range of validity of the Wannier threshold law are discussed.