Re. Marrs et al., MEASUREMENT OF ELECTRON-IMPACT IONIZATION CROSS-SECTIONS FOR HYDROGENLIKE HIGH-Z IONS, Physical review. A, 56(2), 1997, pp. 1338-1345
Electron-impact ionization cross sections have been measured for the h
ydrogenlike ions of molybdenum, dysprosium, gold, and bismuth at selec
ted electron energies between 1.3 and 3.9 times threshold. The cross s
ections were obtained from x-ray measurements of the equilibrium ioniz
ation balance in an electron beam ion trap. The measured cross section
s agree with recent relativistic distorted-wave calculations that incl
ude both the Moeller interaction and exchange.