PROCESSES INVOLVING MULTIPLE  IONIZATION IN COLLISIONS OF  FAST 
H+ AND He2+ IONS WITH Pb ATOMS


 P.C.E. McCartney, M.B. Shah, J. Geddes and H.B. Gilbody


Department of Pure and Applied Physics, The Queen's University of Belfast, Belfast, United 
Kingdom 

Individual cross sections for electron capture and pure ionization processes leading to up to 8 
fold ionization of Pb atoms have been measured and  shown to fit an independent electron 
model with only limited success.