Dr. Sebillaeu has been invited in the framework of the EuSPEC COST action, and he will be talking about:

"A full multiple scattering approach to core EELS and (e,2e) spectroscopies"

D. Sébilleau (1), J. Xu (2), R. Choubisa (3) and C. R. Natoli (4)

(1) Groupe Théorie, Département Matériaux Nanosciences,

     Institut de Physique de Rennes UMR CNRS-UR1 6251,

     Université de Rennes-1, 35042 Rennes cedex, France

(2) Department für Geo- und Umweltwissenschaften, Ludwig Maximilians Universitä}t M\ünchen,
Theresienstrasse 41, 80333 München, Deutschland

(3) Department of Physics,
Birla Institute of Technology and Science, Pilani, Rajasthan 333 031, India

(4) Theory Group, INFN-Laboratori Nazionali di Frascati, c. p. 13, I-00044 Frascati, Italy

Abstract: We derive a multiple scattering (MS) framework for core-level EELS and (e,2e)

spectroscopies. In this real space approach, we consider MS for all electrons,

in contrast to the XAS-like model of the literature where only the excited electron is treated

within the MS formalism.  Our model is targeted at experiments

where all the electrons involved have low kinetic energies so that they are very sensitive

to surface properties. We also show that the EELS cross-section can be recovered from

the (e,2e) cross-section by the use of the optical theorem.