Plasmon Losses in High-Energy X-Ray Photoemission Studied by Quantum Landau Formula

Abstract

Single plasmon losses associated with Al 2s photoemission have been theoretically studied on the basis of the quantum Landau formula, which describes overall features of x-ray photoelectron spectra. So far only photoelectron propagations from the emitters to the surface have been considered, and elastic scatterings have been completely neglected in studies of plasmon satellite peaks. This work takes all possible paths into account and includes elastic scatterings up to single scattering. The former causes rapid decay of the extrinsic loss intensity as a function of the emitter depth, and the latter emphasizes the photoemission from deep atomic sites.

Theoretical study of plasmon losses from Li 1s level in core‐level photoemission spectra

“… Kazama et al have investigated the Al 2s and Na 2s single‐plasmon losses without elastic scatterings, with single scatterings, and with full multiple scatterings. Depth profiles of single‐loss spectra of Na 2s photoelectrons calculated with full multiple scatterings decay faster than without elastic scatterings. Figure shows the difference between the depth profiles of the Li 1s and Na 2s single‐loss intensities calculated with full multiple scatterings.…”

Azimuthal Angular Dependence of Plasmon Loss in Core-Level Photoemission with Multiple Scattering Theory

“…By considering multiple elastic scattering, depth dependence produced by local atomic arrangements [10] and the double slit effect which occurs between two scatters can be considered [11]. Kazama et al have applied these formulas to the plasmon losses excited from Al 2s and Na 2s [12]. They explain the main features observed by Biswas et al Depth dependence of plasmon-loss intensity revealed that the focusing and defocusing effects are observed even in the case of light metal like lithium [13].…”