Abstract
We present the positronium formation cross sections for a positron colliding with lithium and sodium for the collision energies from up to 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 . 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 -wave scattering lengths for positronium scattering from and are also presented.
- Received 21 September 2004
DOI:https://doi.org/10.1103/PhysRevA.71.032713
©2005 American Physical Society