CORRELATION STUDIES OF SIMULTANEOUS EXCITATION-IONIZATION IN HELIUM

             Mevlut Dogan, and Albert  Crowe$^\star $

Department of Physics, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU,  UK

Simultaneous excitation-ionization of helium to the n=2 ion states by electron 
impact is studied experimentally. Results are presented using both the (e,2e) 
and electron-photon correlation methods.