Abstract
The supersymmetric WKB (SKWB) l = 0 phase shifts for the Morse potential up to O( h ̷ 0 and h ̷ 2) are obtained analytically and compared numerically to the exact results and to the lowest-order (ħ 0) WKB approximations with and without the Langer modification. The results show that the lowest-order (ħ 0) SWKB phase shifts are of better overall quality than their WKB counterparts, while the expression up to O( h ̷ 2) is in excellent agreement with the exact phase shifts in the range of validity of the semiclassical methods.
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