Suppression of classical mechanisms by quantum interferences in ionization of H2 by electron impact

O. A. FOJÓN; C. R. STIA; R. D. RIVAROLA

Dublin

Conferencia; International Symposium on (e,2e), Double Photoionization and Related Topics & 16th International Symposium on Polarization and Correlation in Electronic and Atomic Collisions; 2011

University College Dublin

We study here theoretically transitions at fixed equilibrium internuclear distance from the ground state of H2 to the ground (gerade) and first excited (ungerade) state of the H2+ residual target. We consider coplanar geometries in which the incident, scattered and ejected momenta lie all in the same plane. In addition, we analyze asymmetric kinematics situations in which one slow and one fast electron are detected in the final channel. We compute Multiple Differential Cross Sections (MDCS) by means of a molecular three-continuum approximation that gives an excellent agreement with experiments. We show that interferences coming from the coherent emission from both molecular centers in ionization of H2 molecules by electron impact may produce suppression of the binary and recoil peaks usually associated to classical mechanisms.