Eur. Phys. J. D (2013) 67: 85
https://doi.org/10.1140/epjd/e2013-30322-5

Regular Article

Complete break up of ortho positronium (Ps)-hydrogenic ion system

¹ Michael Madhusudan Memorial College, Durgapur, Burdwan, India
² Theoretical Physics Department, Indian Association for the Cultivation of Science, Jadavpur, 700032 Kolkata, India

^a e-mail: chandsin@hotmail.com

Received: 22 May 2012
Received in final form: 20 December 2012
Published online: 30 April 2013

Abstract

The dynamics of the complete breakup process in an Ortho Ps-He⁺ system including electron loss to the continuum (ELC) is studied where both the projectile and the target get ionized simultaneously. The process is essentially a four body problem and the present model takes account of the two centre effect on the electron ejected from the Ps-atom which is crucial for a proper description of the ELC phenomena. The calculations are performed in the framework of Coulomb distorted eikonal approximation. The exchange effect between the target and the projectile electron is taken into account in a consistent manner. Interesting features are noted in the dynamics (FDCS) for both the electrons belonging to the target and the projectile. A distinct broad ELC peak is noted in the fully differential cross sections (FDCS) for the Ps electron. The exchange effect is found to play a dominant role in the FDCS both quantitatively and qualitatively depending on the kinematics.