One particle in a potential -1/r + lambda/r (1-exp(-delta r))

Perturbation series (in powers of delta) for the ground state energy:

Summation of the perturbation series:

Plots of ionization energy (i.e. -E):

Calculate Rayleigh - Schrodinger perturbation series for superposition of the Coulomb and Yukawa potentials

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Designed by A. Sergeev.