ELECTRON PHOTODETACHMENT FROM A DIRAC BUBBLE POTENTIAL - A MODEL FOR THE FULLERENE NEGATIVE-ION C-60(-)

A model for the fullerene anion C60- is proposed in which the outer electron moves in an attractive deltafunction potential in the shape of a spherical bubble. Exact solutions for this "Dirac bubble potential" were previously worked out. On the basis of this model, the photodetachment cross-section and its angular distribution are computed as functions of photoelectron energy, for the electron in both S-like and P-like bound states. Secondary maxima and minima in the cross section appear at higher energy values, somewhat analogous to the scattering of radiation from a conducting sphere.