Eigenwerte des Lippmann-Schwinger-Kerns für Yukawa- und Nukleon-Nukleon-Potentiale

In several papers we recently obtained simple high-energy asymptotic expansions for the solutions and eigenvalues of wave equations containing generalized superpositions of Yukawa potentials. In the present article we extend these investigations to the calculation of phase shifts and eigenvalues of the Lippmann-Schwinger kernel. We also calculate corresponding Padé approximants and illustrate, by means examples, their usefulness, even in regions of low energies.