Solving closecoupling equations in momentum space without singularities
Abstract
Solving the closecoupling equations for electron–atom scattering in momentum space involves the solution of coupled integral equations, which contain principal value singularities. These can be accurately treated numerically using an onshell subtraction technique. Here we show how the singularities may be taken into account analytically, leading to an alternative approach to the solution of the integral equations. The robustness of the method is demonstrated by considering the Swave model of eH scattering across eight orders of magnitude of incident energies.
Citation
Bray, A. and Abdurakhmanov, I. and Kadyrov, A. and Fursa, D. and Bray, I. 2015. Solving closecoupling equations in momentum space without singularities. Computer Physics Communications. 196: pp. 276279.
Source Title
Computer Physics Communications
ISSN
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Department of Physics and Astronomy
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