We present the positronium formation cross sections for a positron colliding with lithium and sodium for the collision energies from 0.01 eV up to 20 eV by the hyperspherical close-coupling method. For Li, our results agree with the experimental data and with other calculations. Our results for Na remain in agreement with previous close-coupling calculations, but do not support the latest experimental data for Na below 1 eV. To validate our model potentials and method in the low-energy regime, the binding energies of positronic lithium and positronic sodium as well as the s-wave scattering lengths for positronium scattering from Li⁺ and Na⁺ are also presented.
A. Le et al., "Positronium Formation in Positron-Li and Positron-Na Collisions At Low Energies," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 71, no. 3, American Physical Society (APS), Mar 2005.
The definitive version is available at https://doi.org/10.1103/PhysRevA.71.032713
Keywords and Phrases
Adiabatic Equations; Hyperspherical Close Coupling (HSCC) Calcculations; Positronic Atoms; Positronium, Binding Energy; Electrodynamics; Electron Scattering; Lithium; Molecular Dynamics; Polarization; Potential Energy; Protons; Reaction Kinetics; Sodium, Positrons
International Standard Serial Number (ISSN)
Article - Journal
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