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Related Experiment Video

Updated: Apr 27, 2026

High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water

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Published on: April 28, 2022

Similarity between positronium-atom and electron-atom scattering.

I I Fabrikant¹, G F Gribakin²

¹Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA.

Physical Review Letters

|July 5, 2014

Summary

This study explains why positronium scattering and electron scattering have similar cross sections. Calculations for positronium-Kr and positronium-Ar collisions support experimental observations.

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Area of Science:

Atomic and Molecular Physics
Quantum Scattering Theory

Background:

Experimental observations show similar cross sections for positronium-atom and electron-atom scattering.
A theoretical explanation for this observed similarity is needed.

Purpose of the Study:

To provide a theoretical explanation for the similarity between positronium-atom and electron-atom scattering cross sections.
To analyze positronium-krypton (Ps-Kr) and positronium-argon (Ps-Ar) collisions.

Main Methods:

Employing the impulse approximation for theoretical calculations.
Analyzing positronium-atom scattering processes.

Main Results:

Calculations for Ps-Kr and Ps-Ar collisions were performed.
The results offer a theoretical basis for the observed similarity in scattering cross sections.

Conclusions:

The impulse approximation successfully explains the similar cross sections for positronium and electron scattering.
This work validates previous experimental findings on positronium-atom interactions.