Convergent close-coupling calculations of positron–helium scattering at intermediate to high energies
Wu, H., Bray, I., Fursa, D.V. and Stelbovics, A.T. (2004) Convergent close-coupling calculations of positron–helium scattering at intermediate to high energies. Journal of Physics B: Atomic, Molecular and Optical Physics, 37 (6). pp. 1165-1172.
*Subscription may be required
The single-centred convergent close-coupling method has been applied to positron-helium scattering at energies from the first ionization threshold to 1 keV for calculating one-electron excitation and ionization processes. Total scattering, positronium formation plus single ionization (unresolved), and target excitation cross sections have been calculated. It is found that the often-used frozen-core approximation for the target structure leads to a small but systematic overestimation of the cross sections. Generally, the agreement between the present and most recent calculations, as well as experiment, is satisfactory.
|Publication Type:||Journal Article|
|Publisher:||IOP Publishing Ltd|
|Item Control Page|