Plasma screening effects on resonant Compton scattering of photons by hydrogenic ions in strongly coupled plasmas

Plasma screening effects on resonant Compton scattering of photons by bound atomic electrons from the ground state of hydrogenic ions in uniformly distributed strongly coupled plasmas are investigated. The interaction energy in strongly coupled plasmas is given by the ion-sphere model potential. The screened radial atomic wave functions and energy eigenvalues for the 1s and 2p states of the target hydrogenic ion in strongly coupled plasmas are obtained by the variation and perturbation methods. The transition matrix element near resonance is obtained by the lowest-order photon-perturbation Hamiltonian in the electronic dipole representation. The resonant Compton scattering cross section including the plasma screening effect is found to be smaller than that neglecting the plasma screening effect since the resonance frequency is increased due to the plasma screening effect. (C) 2000 American Institute of Physics. [S1070-664X(00)04606-1].