Workshop on Fundamental Aspects of X-ray Spectroscopies: 
the role of the 2p core hole in XAS and RIXS.

February 21 & 22, 2013 - Utrecht



Online presentations
Practical information

Contact Information

You are very welcome to participate.

To register send an email to;

There is no conference fee.



This meeting is intended as a continuation of the meeting on X-ray Spectroscopies in Lausanne 2008.
Similar meetings include the 2011 CECAM meeting in Zurich.


Core level spectroscopies have contributed to our understanding of electronic, magnetic and structural properties in  physics, chemistry and materials science. While the portfolio of experimental techniques rapidly grows with higher flux, smaller beam sizes, better energy and time resolution and various sample environments, theory does not always keep up and many experimental results cannot fully be accounted for. This trend is becoming more pronounced with the advent of sources of intense and ultrashort X-ray pulses such as Free Electron Lasers (FELs).

Various aspects such as the effects of the orbital hybridization, translation symmetry, exchange potential, spin-orbit coupling, electron correlations, orbital polarization, magnetic order, plus the final state effects of the core hole potential, intra-atomic (multiplet) effects, (final state) charge transfer effects and multi-electron excitations, are treated differently in the current theoretical approaches. In our opinion, it is desirable to make a concerted effort in order to analyze the current status and discuss how to advance the theory of core level spectroscopy.

A different workshop

The aim of the workshop is not to just show the latest new results, but rather to identify problems in the description of core shell spectra and to discuss the status of theoretical simulations. The format of the workshop is informal and we hope for lively discussions. While the considerable progress in theoretical modelling of core level spectra during the past decades documents the better understanding of electronic structure, we would like to focus during the workshop on cases where to date all theories fail or where no consensus among theorists on the correct approach has been achieved. 


Presentations: We would like to use as much as possible time for discussions. There are time slots of 25 and 20 minutes. We would like to ask the speakers to give a presentation of max. 15 minutes in order to have the remaining time for discussions. I would like everybody to focus on the specific procedure/methods used to obtain the results presented. You can assume everybody knows the basics of x-ray absorption (XAS) and resonant inelastic x-ray scattering (RIXS). The talks given at the workshop will not be made available online (see below)

Contributed online presentations: We would like to ask all speakers to submit a ~5 page presentation (in ppt(x) or pdf format) that introduces the talk. You can also submit additional short presentations for other related topics that you will not present and short general introductions to the topic. You can also submit links to publications and preprints.
You can start sending this material now. Also some people that are not able to be present will be asked to submit a presentation.