title: Similarity between positronium-atom and electron-atom scattering.
abstract: We employ the impulse approximation for a description of positronium-atom scattering. Our analysis and calculations of Ps-Kr and Ps-Ar collisions provide a theoretical explanation of the similarity between the cross sections for positronium scattering and electron scattering for a range of atomic and molecular targets observed by S. J. Brawley et al. [Science 330, 789 (2010)].
authors.affiliation: Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA.
authors.forename: I I
authors.initials: II
authors.lastname: Fabrikant
authors.affiliation: School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom.
authors.forename: G F
authors.initials: GF
authors.lastname: Gribakin