Elastic Photon Scattering from Excited States of Atoms and Ions

J. P. J. Carney, Lynn Kissel^*, R. H. Pratt, S. C. Roy$^{\dag }$ and S. K. Sen Gupta$^{\ddag }$
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
^*V Division L-41, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
$^{\dag }$Department of Physics, Bose Institute, Calcutta 700009, India
$^{\ddag }$USIC, North Bengal University, Darjeeling 734430, India

Abstract:

The elastic scattering of photons from excited state configurations of carbon atoms and ions is considered, using the S-matrix approach, for configurations involving varying numbers of K and L electrons, with any remaining electrons being placed in an outer (N) shell. Situations where the scattering cross section is much larger or smaller than that for the ground state configuration are identified.