A variational unification of low- and high-energy methods
Dževad Belkić · 2020
The close coupling methods, valid at low energies E 1 and developed on a molecular basis set, are known to largely overestimate the experimental results at moderate E m and high E h impact energies. This is due to the inability of a restricted basis set, truncated for the practical reasons of numerically solving a large number of the coupled differential equations, to describe the continuum adequately, which becomes rapidly important with augmentation of E inc . The situation is diametrically opposite to the high-energy perturbative methods, which systematically overestimate the measurements at E 1 and the lower portion of E m due to an excessive account of the continuum. The ultimate goal would be to connect the low- and high-energy models in order to cover the entire energy region and particularly the critical domain of E m where none of the existing treatments is applicable.