Vortices in the final-state continuum of a positron-atom ionization collision

V. D. RODRÍGUEZ; F. O. NAVARRETE; R. DELLA PICCA; J. FIOL; R. O. BARRACHINA

Paris

Conferencia; The 23rd International Conference on Atomic Physics ICAP 2012; 2012

Ecole Polytechnique, Palaiseau

We employ a continuum distorted wave (CDW) approximation with the correct kinematics tocalculate the probability flux of the final-state continuum in the ionization of atoms by positronimpact. Different structures are unveiled and investigated, among them a vortex, akin to adeep minimum recently uncovered in the quintuple-differential cross section for electron-atomionization collision [1]. We also explore how this structure develops in the multidimensionalcontinuum of the impinging positron, the emitted electron and the recoiling ion. Finally, wediscuss this finding in the framework of Madelungs hydrodynamical and de Broglie - Bohmformulations of Quantum Mechanics.