Calculation of Potential Functions

The potential functions U) iy r) of Eq. (9.55) are required for the electron-electron Coulomb interaction. We recall that they may be written as 

---

Calculations of potential functions for other excited states, many of which correspond to stable states of the molecule-ion, have been made by various investigators,1 among whom Teller, Hylleraas, and Jaff6 deserve especial mention. 

---