Convergent-close-coupling formalism for positron scattering from molecules
Citation
Zammit, Mark C. and Fursa, Dmitry V. and Bray, Igor. 2013. Convergent-close-coupling formalism for positron scattering from molecules. Physical Review A. 87 (2): pp. 020701-(R)1 - 020701-(R)-4.
Source Title
Physical Review A
ISSN
Remarks
Copyright © 2013 by the American Physical Society
Collection
Abstract
The ab initio convergent-close-coupling method has been extended to positron-molecule collisions within the adiabatic (fixed-nuclei) approximation. Application to molecular hydrogen at energies from 0.1 to 1000 eV has yielded convergent total ionization and grand total cross sections over most of the energy range. We find that very large calculations are required for convergence, even in the case of low-energy elastic scattering, due to the effects of positronium formation. In general, the comparison with experiment is good.
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