Second-Order WKB Corrections to Rydberg—Klein—Rees Potential Curves

Abstract
Expressions given in an earlier paper are applied to the X 1Σg+ ground state of hydrogen. The second‐order approximations were found to have little effect upon the turning points of the curve, the major correction being an increase in the well depth of 10 cm−1. The method appears to have certain advantages over the Dunham procedure.