1 research outputs found
Ultrafast charge transfer processes accompanying KLL Auger decay in aqueous KCl solution
X-ray photoelectron spectroscopy (XPS) and KLL Auger spectra of aqueous KCl
solution were measured for the K and Cl edges. While the XPS spectra of
potassium and chloride have similar structures, both exhibiting only weak
satellite structures near the main line, the Auger spectra of these
isoelectronic ions differ dramatically. A very strong satellite peak was found
in the K KLL Auger spectrum at the low kinetic energy side of the D
state. Using equivalent core models and ab initio calculations this spectral
structure was assigned to electron transfer processes from solvent water
molecules to the solvated K cation. Contrary to the potassium case, no
extra peak was found in the KLL Auger spectrum of solvated Cl indicating on
a strong dependence of the underlying processes on ionic charge. The observed
charge transfer processes are suggested to play an important role in charge
redistribution following single and multiple core-hole creation in atomic and
molecular systems placed into an environment