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

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

• A program (there, lambda means g)
• The first 102 coefficients of the perturbation series

Summation of the perturbation series:

• A program
• Results of summation - energy (real and complex parts) and estimated number of correct digits vs lambda and delta

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

• Dependence on lambda, near lambda=1
• Dependence on lambda, 0<lambda<2
• Comparison with ionization energy of two-electron ions as a function of lambda=1/Z

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

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Designed by A. Sergeev.