Abstract
The present work is a generalization of the dynamical screening factor presented by Lo et al. [J. Phys. B 40, 3973 (2007)] to consider an atom located at an arbitrary position within the fullerene. A more elaborate investigation into the case where the atom is located at the center is performed and compared with quantum-mechanical calculations for dynamical screening factors of [M. E. Madjet et al., Phys. Rev. Lett. 99, 243003 (2007)] and [H. S. Chakraborty et al., Phys. Rev. A 78, 013201 (2008)]. The and plasmons of the fullerene are accounted for in a modified screening factor to improve correspondence with the quantum calculations. The spatial dependence of the screening factor was explored with and and found to depend significantly on the radial distance of the atom from the center of the fullerene. A spatial averaging of the screening factor is presented.
- Received 15 February 2009
DOI:https://doi.org/10.1103/PhysRevA.79.063201
©2009 American Physical Society