Cm. Hsiao et al., QUANTUM CONFINEMENT EFFECT ON THE IMPURITY STATES OF A SPHERICAL CONFINING SYSTEM, Solid state communications, 81(10), 1992, pp. 807-810
Whittaker function and scattering Coulomb wave function are used to ca
lculate the eigen-energies of an impurity in a spherical confining sys
tem. Variation of the state energies with the radii of the confining s
ystem is obtained.