For spherically symmetrical potentials we can apply the WKB approximation to the radial part (Equation 1). In the case l = 0 it is reasonable15 to use Equation 8.47 in the form
[8.54]
where r0 is the turning point (in effect, we treat r = 0 as an infinite wall) Exploit this formula to estimate the allowed energies of a particle in the logarithmic potential
(for constants V0 and a). Treat only the case l = 0. Show that the spacing between the levels is independent of mass. Partial answer:
Equation 1
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