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EFFECTS OF MANY-BODY INTERACTIONS IN EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY (EXAFS)

Abstract : We present the first a priori derivation of a many-body theory for EXAFS with clearly defined approximations and with final expressions which are feasible for quantitative evaluations. We conclude that the conventional EXAFS expression should be complemented with a term that crudely is the main term, energy-shifted and scaled down by a factor of order 0.2-0.3. Further the f-factors depe

Theoretical study of electronic structure and optical properties of semiconductor nanostructures

In this thesis, the electronic structure and optical properties of semiconductor nanostructures are studied theoretically. Three types of nanostructures have been studied, silicon nanocrystals, free-standing III-V nanowires and free-standing GaAs/AlGaAs nanowire superlattices. The calculations have been carried out using an atomistic, empirical tight-binding approach. Silicon nanocrystals have at

Re-organising the logistics resources of companies after mergers and acquisitions

This paper discusses the relation between logistics and Mergers and Acquisitions (M&A) of companies within the same industry and same industry level (i.e. horizontal M&A). The purpose is to study the effects of M&A on the logistics resources of companies and the possibility for companies to benefit from the re-organising of these resources in the form of synergies. The study hopes to a