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Starting with the $S$-wave radial equation for an attractive centralpotential $V(r)$, we give results for the $n$ (principal quantum number) andthe $\mu$ (reduced mass) dependence of $R_{n0}(0)$, the $S$-wave radialwavefunction at the origin, for potentials with definite curvature.

Some results for the wave function at the origin for S-wave levels