Multiple ionization of Ne, Ar, Kr and Xe by different ions

C. C MONTANARI; E. C. MONTENEGRO; J. E. MIRAGLIA

Fort Worth, Texas

Congreso; 21st International Conference in the application of accelerators in research and industry; 2010

University of North Texas and Sandia National Laboratories

We present theoretical single to quintuple ionization cross sections for Ne, Ar, Kr, and Xe bombarded by H+ and He+. Post-collisional contributions due to Auger-like processes are taken into account by using recent photoionization data. Present CDW-EIS and first Born approximation results are compared with the experimental data available in the range of energies (50-10000) keV for H+ in Ne and Ar, and (50-1000) keV/amu for the other cases. In general, the combination of the CDW-EIS with the post-collisional branching ratios describes well the multiple ionization data above 300 keV/amu, showing a clear tendency to coalesce with first Born approximation for high energies. The surprising result of this work is the good performance of the first Born approximation which describes very well the experimental data of double and triple ionization, even in the intermediate energy range (50-300) keV/amu, where direct ionization is the main contribution.