Light-particle single ionization of argon: Influence of the projectile charge sign

S. OTRANTO; R. E. OLSON

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

AMER PHYSICAL SOC

Año: 2009 vol. 80 p. 1 - 5

1050-2947

The ionization of the 3p orbital of argon by incident electrons and positrons is studied by means of the postversion of the continuum distorted wave–eikonal initial-state model. Results are presented at both 200 and 500eV impact energies for conditions amenable to present experiments. Differences in the fully differential crosssections ͑FDCSs͒ are analyzed and the influence of the projectile charge sign on the emission dynamics isdiscussed. The FDCSs are found to display the classic binary plus recoil peak structure at 500 eV, but transitionto a more complicated four-lobed structure at the lower impact energy.