Peculiarities of Matrix-Element Calculations with Few Coulomb Functions for Particles’ Scattering Processes
1 Joint Institute for Nuclear Research, Dubna, Moscow region 141980, Russia
2 Institue of Mathematics, National University of Mongolia, Ulan-Bator, Mongolia
3 Department of Nuclear Physics and Quantum Theory of Collisions, Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
4 Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, Russia
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Published online: 14 February 2018
Specific features of the matrix-element calculations in the momentum-space representation are discussed for the single ionization of the He atom by fast proton impact in the case when the Coulomb interactions of all three charged fragments in the final state are taken into account. It is shown that a “soft” smoothing of the Coulomb singularity does not affect the accuracy of the calculations in a certain region of the smoothing parameter values.
© The Authors, published by EDP Sciences, 2018
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