Institution: | a Lise, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium b RMN, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium c EMAT, University of Antwerp, 171 Groenenborgerlaan, B-2020 Antwerp, Belgium d Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22603 Hamburg, Germany |