Many-body theory for positronium-atom interactions
Atomic Physics
2018-05-07 v3 Quantum Physics
Abstract
A many-body-theory approach has been developed to study positronium-atom interactions. As first applications, we calculate the elastic scattering and momentum-transfer cross sections and the pickoff annihilation rate for Ps collisions with He and Ne. The cross section for He is in agreement with previous coupled-state calculations, and the momentum-transfer cross section for Ne agrees with available experimental data. is found to be 0.13 and 0.26 for He and Ne, respectively, in excellent agreement with the measured values.
Cite
@article{arxiv.1709.00394,
title = {Many-body theory for positronium-atom interactions},
author = {D. G. Green and A. R. Swann and G. F. Gribakin},
journal= {arXiv preprint arXiv:1709.00394},
year = {2018}
}
Comments
Accepted by Phys. Rev. Lett. (V2 contains update to text and Figs. 3 and 5. V3 contains further discussion on the calculation of pickoff annihilation rates.)