Theoretical Investigation of Intrinsic and Extrinsic Plasmon Effects in the X-Ray Spectra of Aluminum

The origin of non-diagram X-ray satellite structures in aluminum (Al) is investigated theoretically by extending the Bohm-Pines Hamiltonian within a many-body framework. By rigorously separating the contributions of intrinsic and extrinsic plasmon-coupling mechanisms, explicit expressions for the non-diagram-to-parent-diagram X-ray line yield ratios and relative intensities are derived. The calculated energy separations (ΔE) and relative intensity profiles (I/I_0) for the high-energy plasmon satellites associated with the Kα emission spectra show exceptional concordance with the experimental findings reported by Mauron and Dousse. These results confirm that collective plasma oscillations play a dominant role in governing the satellite line shapes and intensity distributions of light metals.