1. Laboratoire
Charles Coulomb, UMR 5221, Université Montpellier 2, F-34 095, Montpellier, France
2. Laboratoire
Charles Coulomb, UMR 5221, CNRS, F-34 095, Montpellier, France
3. UMR
5253 CNRS-UM2-ENSCM-UM1, Equipe I.A.M., Institut Charles Gerhardt Montpellier, 8 rue de l’Ecole Normale, F-34 296 Montpellier Cedex 5, France
4. European Synchrotron Radiation Facility, ESRF, 6 rue Jules Horowitz, BP 220, F-38
043, Grenoble, Cedex 9, France