Interference between direct ionisation and positronium formation in continuum in positron-hydrogen collisions

[摘要] The fully differential cross section for positron-impact ionisation of hydrogen is calculated in a two-centre Born approximation. It is suggested that two-centre approaches to the problem should assume incoherent combination of contributions from direct ionisation of the atom and positronium formation in continuum.

[发布机构] ARC Centre for Antimatter-Matter Studies, Curtin University, GPO Box U1987, Perth; WA; 6845, Australia^1

[关键词] Fully differential cross sections;Positron-hydrogen collisions;Positronium formation