ELECTRON AND POSITRON IMPACT MULTIPLE IONIZATION

C. C. MONTANARI; J. E. MIRAGLIA

San Carlos de Bariloche

Congreso; 17th International Conference on the Physics of Highly Charged Ion; 2014

Fundación Balseiro y Local Organizing Committee of the 17th International Conference on the Physics of Highly Charged Ion

We present theoretical calculations for multiple ionization (single to sextuple) of Ne, Ar, Kr using the CDW-EIS approximation, adapted for light-particle impact (electrons or positrons). The central key of our approach is to adapt the heavy-ion atom collision results to cope the physics of light particle impact [1]. To this end we considered the charge effect, the minimum electron impact energy to allow ionization, a finite transversal maximum momentum transfer, and the trajectory correction for light particles (it is far from being a straight line) using the Abel transformation. Multipleionization is calculated within the independent electron model via the multinomial expansion. We take into account the direct and the post-collisional ionization (PCI) [1-4]. The latter by including experimental branching ratios of Auger type processes. PCI is very important in the high-energy region. For light particles the multinomial expansion must also be corrected to include an energy restriction to cancel those terms that are energetically forbidden.