Doubly Differential Cross Sections of Low-Energy Electrons Emitted in the Ionization of Molecular Hydrogen by Bare Carbon Ions

Authors

Lokesh C. Tribedi, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas
P. Richard, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas
D. Ling, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas
Y. D. Wang, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas
C. D. Lin, J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas
R. Moshammer, Gesellschaft fu¨r Schwerionenforschung, Darmstadt, Planckstrasse 1, D-64291, Federal Republic of Germany
G. W. Kerby III, University of Nebraska - Lincoln
M. W. Gealy, University of Nebraska - Lincoln
M. Eugene Rudd, University of Nebraska - LincolnFollow

Date of this Version

9-1996

Comments

Published in Physical Review A Volume 54, Number 3, September 1996. Copyright © American Physical Society; used by permission.

Abstract

We have measured the double differential cross sections (DDCS) (d²σ/dε_edΩ^e) of low-energy electron emission in the ionization of H₂ bombarded by bare carbon ions of energy 30 MeV. The energy and angular distributions of the electron DDCS have been obtained for 12 different emission angles and for electron energies varying between 0.1 and 300 eV. We have also deduced the single differential and total ionization cross section from the measured DDCS. The data have been compared with the predictions of first Born approximations and the CDW-EIS (continuum distorted wave–eikonal initial state) model. The CDW-EIS model provides an excellent agreement with the data. [S1050-2947~96!10109-8]